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News · October 2026

SEO and Digital Marketing News: May 2026.

Google I/O and Marketing Live, the May 2026 core update, FAQ rich results gone, Web Bot Auth, new link styles in AI answers and self-serve ChatGPT ads. 20 changes, each linked to its source.

Amit TiwariNews19 min read
20changes tracked
19with an official source
1 billion+monthly AI Mode users, per Google
12 daysMay 2026 core update rollout

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// SEO Last Month · published 5 Jun 2026 · 15 min 56 s · open on YouTube

Every May change

20 of 20

Official: company page or staff postConfirmed testSpotted by practitionersPress report

Search enginesOfficial

Ask.com shuts down after nearly 30 years

IAC closed Ask.com on 1 May 2026. A statement on the Ask.com homepage says IAC is discontinuing its search business, which includes Ask.com. The site started as Ask Jeeves, launched in 1997, and IAC bought it in 2005 for $1.85 billion.

Why it matters + what to do

Any traffic, ads or search syndication that still ran through Ask.com has stopped. For most sites the referral numbers were already very small.

Do this: Check your analytics referrals for ask.com. If it still shows up, note the 1 May end date so nobody reads the drop as a ranking problem.

MeasurementOfficial

Google announces Meridian GeoX for regional lift tests

Ahead of Google Marketing Live, Google announced Meridian GeoX, a geo-experiment tool that measures the extra results a campaign drives in the regions where it runs. It is built on open-source code and feeds its results into Meridian, Google’s marketing mix model. Google says testing begins later this year. The same post said Data Manager will let advertisers combine Google tag data with signals such as store sales.

Why it matters + what to do

Geo tests compare regions with ads against regions without them, one of the few ways to see real lift without user-level tracking. Keep in mind that Google is building the tool that grades Google’s own ads.

Do this: If you run ads across Indian states or cities, list the regions you could pause for a few weeks as a test group. You will need that plan once GeoX opens.

CrawlingOfficial

Google tests Web Bot Auth to sign some agent requests

Google published a crawling help page on Web Bot Auth, an experimental protocol based on an IETF draft that lets bots sign their requests so sites can verify them. For now only some requests from Google-Agent, the fetcher that acts for users, are signed, as https://agent.bot.goog. Google says to keep using IP addresses, reverse DNS and user-agent strings, because not every request is signed.

Why it matters + what to do

Fake Googlebot and fake AI agents are a common way to get past bot rules. Signed requests give your CDN or firewall proof that a visitor really is Google, once providers support it.

Do this: Ask your hosting, CDN or security provider whether they support Web Bot Auth, and check that your bot rules do not block Google-Agent by mistake.

ChatGPT AdsOfficial

ChatGPT ads get a self-serve Ads Manager and CPC bidding

OpenAI began rolling out a beta self-serve Ads Manager where businesses can register, set budgets and bids, upload ads and run campaigns. Access is opening gradually, and OpenAI did not list countries. Ads were first sold on CPM, and OpenAI has added CPC bidding, where advertisers pay only for clicks. Measurement now includes a Conversions API and a pixel, with aggregated reports and no access to individual conversations.

Why it matters + what to do

ChatGPT ads no longer need a direct deal with OpenAI. With a pixel and CPC bidding, they can be judged on the same cost per sale as Google and Meta.

Do this: Check whether the Ads Manager beta is open to your account. Plan the pixel and Conversions API setup before you spend, so the first campaign is measured properly.

LighthouseOfficial

Lighthouse adds an llms.txt audit under Agentic browsing

Lighthouse 13.3.0, released on 7 May, added an Agentic browsing category. One of its audits covers llms.txt: it flags server errors when the file is fetched, and marks a missing file as Not Applicable because the file is optional. The category is separate from the SEO category, is marked as under development, and was not in PageSpeed Insights at launch.

Why it matters + what to do

This is a readiness check for AI agents, not a ranking signal. Google has not said Search uses llms.txt, so a missing file costs nothing in Google rankings.

Do this: If you already have an llms.txt, run Lighthouse from the CLI or Chrome DevTools and make sure the file returns 200, not a server error. Do not sell llms.txt to clients as an SEO fix.

AdSenseOfficial

AdSense stops vignette ads on the back button from 15 June

From 15 June 2026, pressing the browser back button no longer shows an AdSense vignette ad. The change is automatic for publishers who turned on “Allow additional triggers for vignette ads”, in all supported browsers including Chrome, Edge and Opera. Google says it made the change because Search added back button hijacking to its spam policies, enforced from 15 June.

Why it matters + what to do

Google’s own ad product was triggering behaviour that Google Search now treats as spam. If your theme, a plugin or another ad network still traps the back button, the risk is in Search rankings.

Do this: Nothing to change in AdSense. On mobile, press back on your ad-heavy pages and make sure you leave the page with no ad or interstitial in between, for every ad network you run.

Structured dataOfficial

FAQ rich results disappear from Google Search

As of 7 May 2026, FAQ rich results no longer appear in Google Search, including for the government and health sites that kept them after the 2023 cut. Google said the FAQ report and Rich Results Test support would go in June 2026, and Search Console API support in August 2026. Google removed the FAQ documentation on 15 June.

Why it matters + what to do

Nothing changes in rankings: John Mueller said the markup was only used for a small set of site types. The extra space in results that government and health sites got from FAQ snippets is gone.

Do this: Leaving FAQ markup in place or removing it are both fine. Update audit checklists, plugin settings and client reports that still count FAQ rich results as a win, and remove FAQ from any Search Console API scripts.

Merchant CenterOfficial

Merchant Center for Agencies opens in all markets

Google released Merchant Center for Agencies to all markets on 11 May. Before this it was only in the US and Canada, after a beta that began in October 2025. It gives agencies one dashboard for every client account, with issues across clients that can be filtered by client, country or channel, and early alerts that help prevent suspensions. Agencies have to contact Google to get an account created.

Why it matters + what to do

Indian agencies running Shopping for several clients can now find feed and account problems across all of them in one view, instead of opening each Merchant Center separately.

Do this: Contact Google to set up a Merchant Center for Agencies account, then check the cross-client issues view for anything that could lead to a suspension.

Search ConsoleOfficial

Search Console under-reports Discover for 7 and 8 May

Google added a note to its Search Console data anomalies page: a logging error caused a drop in clicks and impressions in the Discover report from 7 May until 8 May 2026. Only the reporting was affected, not actual Discover traffic. Google did not say the missing data would be restored.

Why it matters + what to do

A two-day Discover dip on those dates is a logging gap, not a penalty or a content problem.

Do this: Add a 7-8 May annotation to your Discover reports, and check your own analytics for Google referrals on those days before drawing conclusions.

Google Ads · ReportingOfficial

Google Ads search terms can be an estimate, not the typed query

Google added an “advanced search experiences” section to a Google Ads help page. For searches from AI Mode, AI Overviews, Lens and autocomplete, the search term in your reports “represents the best approximation of the user’s intent”. These searches are not treated as identical to a keyword, so AI picks the ad group or asset group. Anthony Higman first pointed out the change on LinkedIn.

Why it matters + what to do

Some rows in the search terms report are Google’s reading of what the person meant, not what they typed. Negatives or new keywords built from those rows can target words nobody searched.

Do this: Before adding negatives from odd-looking search terms, check whether they read like a summary rather than a typed query. Base keyword decisions on terms with real, repeated volume.

Merchant CenterOfficial

Merchant Center gets an AI advisor, later named Ask Advisor

A chatbot labelled “Merchant Advisor” was spotted in beta inside Merchant Center, first by Tamara Hellgren. Google’s own page calls it Ask Advisor in Merchant Center: it explains performance from your product data, walks you through product and account issues such as disapprovals, and suggests actions like promotions or title changes. At Google Marketing Live on 20 May, Google brought its advisors together as Ask Advisor, in beta for English-language accounts, with the Merchant Center agent “joining the lineup soon”.

Why it matters + what to do

Feed fixes and disapproval help move from support tickets to a chat window. The beta notice says it may show inaccurate information, so its advice needs checking.

Do this: When it appears in your account, ask it why your top disapproved products were rejected and compare the answer with the Diagnostics page.

Microsoft ClarityOfficial

Microsoft Clarity’s AI citations dashboard is generally available

Microsoft made the Citations dashboard in Clarity generally available on 13 May, under Dashboards, AI Visibility. It shows how often your pages were cited in AI answers, your share of authority against other cited domains, AI referral traffic as a share of sessions, the queries AI systems used, which pages were cited, and trendlines. Some setups need domain verification through Bing Webmaster Tools or Google Search Console. Microsoft does not name which AI services it covers.

Why it matters + what to do

This is a free first-party view of AI citations, next to the session data Clarity already records. Since the covered AI services are not named, read the numbers as a trend, not a full count.

Do this: Install Clarity on one client site, verify the domain through Search Console, and export the cited pages list every month next to your Search Console data.

Google Marketing LiveOfficial

Google Marketing Live: Gemini-built ads tested in AI Mode

At Google Marketing Live on 20 May, Google said it is testing two ad types in AI Mode built with Gemini: Conversational Discovery ads, which answer the person’s specific question, and Highlighted Answers, where ads can appear in AI Mode’s lists of recommendations. Both stay labelled Sponsored. Asset Studio will create assets from your brief, brand guidelines and website, rolling out globally in English this summer. Merchant Center’s new AI performance insights, which compare your share of voice with similar brands, come to India, the US, Canada, Australia and New Zealand in the coming months.

Why it matters + what to do

In AI Mode, Gemini writes the ad around each question, so your control moves from headlines to inputs: site content, product feed and brand guidelines. Google advised building on Performance Max and AI Max to be ready.

Do this: Clean up landing pages and the product feed, since Gemini writes ads from them. Put each client’s brand guidelines in one short document now so it is ready for Asset Studio.

RankingOfficial

May 2026 core update rolls out

Google started the May 2026 core update at 8:40 a.m. Pacific on 21 May (9:10 p.m. in India) and said it could take up to two weeks. Google confirmed the rollout was complete on 2 June 2026, about 12 days later.

Why it matters + what to do

Core updates re-rank sites broadly, not for one policy breach. A drop between 21 May and 2 June is more likely this update than anything you changed that week.

Do this: Compare Search Console data by page for the two weeks after 2 June against the two weeks before 21 May. Look at which page types lost, not just the total.

Google Ads · PolicyOfficial

Google Ads reviews Responsive Search Ads in real time

Google Ads now checks Responsive Search Ad text as you write it, flagging editorial issues like typos, symbols and capitalisation field by field, and gives a policy decision the moment you save. Ads with no issues can serve right away. It works in the Google Ads interface and Google Ads Editor, with Performance Max and Demand Gen expected in the second half of 2026. Google’s announcement page carries an April 2026 date, and the rollout was first reported on 27 May.

Why it matters + what to do

New search ads no longer wait hours for review, which helps with sales and time-bound offers. Complex issues, such as ads that need a certification, still go through the old route.

Do this: Build festive sale ads in the interface or Editor and fix flagged issues on the spot. For restricted categories, apply for certification well before the sale starts.

Background: what May adds up to

1. Search and ads move further into AI Mode

In two days Google made Gemini 3.5 Flash the default in AI Mode, put a follow-up box on AI Overviews that leads into AI Mode, and announced ads that Gemini writes for each AI Mode question. Earlier in May it changed how links sit inside AI answers, with inline links and hover previews. By Google’s count, AI Mode passed one billion monthly users.

For SEO, the click now goes to the page that best backs one specific sentence, so pages need clear, quotable facts near the top. For PPC, Google’s own help page now says some search terms are only an approximation of intent. Read the search terms report as a hint, and judge AI Mode traffic on conversions, not on query lists.

Related: I/O · inline links · AI Mode ads · search terms

2. Sites get checked for AI agents

Google started signing some Google-Agent requests with Web Bot Auth. Lighthouse added an Agentic browsing category with an llms.txt audit. Microsoft Clarity made its AI citations dashboard generally available. In the same month, FAQ rich results, an old way to take extra space in Google results, were switched off on 7 May.

None of the new checks is a Google ranking factor, and Lighthouse marks a missing llms.txt as Not Applicable. What changes is access and reporting. Make sure your firewall lets real Google-Agent requests through, track AI citations in Clarity next to Search Console, and stop listing FAQ rich results as a deliverable in client reports.

Related: Web Bot Auth · llms.txt audit · Clarity citations · FAQ rich results

3. AI helpers move into the ad account

Google Ads announced Gemini-built Dashboards, Merchant Center showed a chat advisor that became Ask Advisor, policy checks now run as you type, and a Leads page turned Google Ads into a basic CRM. Outside Google, OpenAI opened a self-serve Ads Manager for ChatGPT with CPC bidding and a pixel.

Each of these saves time, and each puts more of your decisions on data the platform holds and summarises for you. Keep your own copy. Export leads to your CRM, check AI summaries against standard reports, and set up conversion tracking on ChatGPT ads before spending, so every platform is judged on the same sales numbers.

Related: Dashboards · Ask Advisor · policy reviews · Leads page · ChatGPT ads

Your May checklist

Tick items as you finish them. Your ticks stay in this browser only.

How this page is put together

Every item comes from the description of my SEO Last Month video covering May 2026. I checked each one against the original page where one exists. Items that come from practitioners or the press are labelled as such. Dates are the date of the original source, not the date of later coverage. If I got something wrong, tell me and I will correct it here with a note.

Sources

  1. Ask.com farewell statement: Ask.com shuts down after nearly 30 years
  2. Engadget: Ask.com shuts down after nearly 30 years
  3. PPC Land: Ask.com shuts down after nearly 30 years
  4. Google Ads and Commerce blog: Google announces Meridian GeoX for regional lift tests
  5. Google crawling docs: Google tests Web Bot Auth to sign some agent requests
  6. Search Engine Journal: Google tests Web Bot Auth to sign some agent requests
  7. OpenAI: ChatGPT ads get a self-serve Ads Manager and CPC bidding
  8. Google Search blog: AI Mode and AI Overviews change how links appear
  9. Chrome for Developers: Lighthouse adds an llms.txt audit under Agentic browsing
  10. DebugBear: Lighthouse adds an llms.txt audit under Agentic browsing
  11. PPC Land: Lighthouse adds an llms.txt audit under Agentic browsing
  12. AdSense Help: AdSense stops vignette ads on the back button from 15 June
  13. Search Central blog: back button hijacking: AdSense stops vignette ads on the back button from 15 June
  14. Search Central changelog: FAQ rich results disappear from Google Search
  15. FAQ docs (now removed): FAQ rich results disappear from Google Search
  16. Search Engine Roundtable: FAQ rich results disappear from Google Search
  17. Merchant Center Help: Merchant Center for Agencies opens in all markets
  18. Ads Liaison on X: Merchant Center for Agencies opens in all markets
  19. Search Engine Roundtable: Merchant Center for Agencies opens in all markets
  20. Menachem Ani on X: Google Ads to auto-link YouTube channels after 10 June
  21. Search Engine Roundtable: Google Ads to auto-link YouTube channels after 10 June
  22. Google Ads Help: YouTube linking: Google Ads to auto-link YouTube channels after 10 June
  23. Google Ads on X: Google Ads announces Dashboards built with Gemini
  24. Search Engine Land: Google Ads announces Dashboards built with Gemini
  25. Search Console Help: data anomalies: Search Console under-reports Discover for 7 and 8 May
  26. Search Engine Roundtable: Search Console under-reports Discover for 7 and 8 May
  27. Google Ads Help: Google Ads search terms can be an estimate, not the typed query
  28. Search Engine Roundtable: Google Ads search terms can be an estimate, not the typed query
  29. Google: Ask Advisor in Merchant Center: Merchant Center gets an AI advisor, later named Ask Advisor
  30. Google Ads and Commerce blog: Ask Advisor: Merchant Center gets an AI advisor, later named Ask Advisor
  31. Search Engine Roundtable: Merchant Center gets an AI advisor, later named Ask Advisor
  32. Microsoft Clarity blog: Microsoft Clarity’s AI citations dashboard is generally available
  33. Google Search blog: I/O 2026: Google I/O: new Search box, Gemini 3.5 Flash and Universal Cart
  34. Google Shopping blog: Universal Cart: Google I/O: new Search box, Gemini 3.5 Flash and Universal Cart
  35. Google Ads and Commerce blog: GML 2026: Google Marketing Live: Gemini-built ads tested in AI Mode
  36. Google: new ads in AI Mode: Google Marketing Live: Gemini-built ads tested in AI Mode
  37. Google: Asset Studio updates: Google Marketing Live: Gemini-built ads tested in AI Mode
  38. Google: shopping updates: Google Marketing Live: Gemini-built ads tested in AI Mode
  39. Search Status Dashboard: May 2026 core update rolls out
  40. Google Search Central on LinkedIn: May 2026 core update rolls out
  41. Search Engine Roundtable: May 2026 core update rolls out
  42. Google Ads announcement: Google Ads reviews Responsive Search Ads in real time
  43. Search Engine Roundtable: Google Ads reviews Responsive Search Ads in real time
  44. Google Ads announcement: Google Ads adds a Leads page for Google-hosted form leads
  45. PPC News Feed: Google Ads adds a Leads page for Google-hosted form leads
  46. Search Engine Roundtable: Google Ads adds a Leads page for Google-hosted form leads

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