Google held two big events in May 2026, just a day apart. Google I/O ran on 19–20 May, and Google Marketing Live followed on 20 May. Between them, Google made one thing very clear: search and advertising are now built around AI first, and the old "ten blue links" page is no longer the main event. If your website depends on Google traffic, your plan from the start of the year is already out of date.
Here is the short version. AI Mode, Google's chat-style search experience, has passed one billion users a month. AI Overviews, the AI summary that sits at the top of normal search results, now reaches 2.5 billion users a month. Google also launched a core update in the same week. So this is not a "future" story. It is happening right now, and it changes how people find your business.
Below we break down what was announced, what it means in plain terms, and the practical things worth doing on your site this quarter.
What is Google I/O, and why should a business owner care?
Google I/O is Google's yearly event for developers, but in recent years it has turned into Google's main AI announcement. It is where Google shows the direction it is heading. Google Marketing Live (often shortened to GML) is the matching event for advertisers, where new ad products and campaign tools are revealed.
You should care because what Google demos at these events usually turns up in real search results within months. The 2026 events told us how people will be searching, shopping and discovering businesses for the next year. If you sell anything online, or you rely on people finding you through Google, this is your roadmap.
The headline numbers from Google I/O 2026
Two figures stood out, and both came straight from Google's chief executive Sundar Pichai during the opening keynote on 19 May.
AI Mode has surpassed one billion monthly active users in roughly a year since launch. AI Overviews now has over 2.5 billion monthly active users. Google also said that searches inside AI Mode are around three times longer than normal searches, and that the number of AI Mode queries has been doubling every quarter.
Why does length matter? Because longer, more conversational questions change what content wins. People are no longer typing "best running shoes". They are typing things closer to "what are the best running shoes for flat feet under £100 that last more than a year". Your content needs to answer those fuller, more specific questions.
The Google I/O 2026 changes that affect your website
1. A new, smarter search box
Google redesigned its search box for the first time in around 25 years. It now expands as you type to handle longer, more natural questions, and it suggests queries based on what it thinks you actually want, rather than just finishing your sentence. In practice, this nudges even more people towards detailed, question-style searches.
2. Gemini 3.5 Flash now powers AI Mode
AI Mode is now run by a newer model called Gemini 3.5 Flash, rolling out across roughly 200 countries. The takeaway for you is not the model name. It is that the AI summarising the web and choosing which sources to mention is getting faster and better at reasoning, so the quality and clarity of your content matters more than ever.
3. Always-on "information agents"
Google announced information agents that work in the background, 24 hours a day, watching the web for updates on topics a user cares about. Instead of someone searching for your product, an agent might quietly track price drops or news and ping the user when something changes. This is a genuine shift: you are no longer optimising only for the moment someone searches. You are optimising to be the source an agent keeps coming back to.
4. Agentic booking and shopping
Google is moving towards letting users book local services and buy products without ever visiting a website, through a feature called Universal Cart that works across Search, the Gemini app, YouTube and Gmail. For service businesses and shops, this means your structured data (your prices, availability and product details) needs to be clean and machine-readable, because the AI may act on it directly.
Google Marketing Live 2026: the advertising side
Marketing Live 2026 was summed up by one idea: Gemini now sits at the centre of Google's entire advertising system. Here are the announcements most relevant to a typical business website.
Conversational ads inside AI Mode
Google introduced new ad formats built for AI Mode and conversational search. Rather than matching a fixed keyword, the system reads the full conversation and generates ad creative that fits the person's specific question and context. For advertisers, this means your product feeds and assets need to be rich and accurate, because the AI assembles the ad.
Ask Advisor
Ask Advisor is a new Gemini-powered assistant that spans Google Ads, Google Analytics, Merchant Center and the Google Marketing Platform. Think of it as an always-on helper that pulls insights across all your Google marketing tools and suggests what to do next. It is Google's answer to similar tools from Meta and Microsoft.
Universal Commerce Protocol and Universal Cart
Google expanded its Universal Commerce Protocol (UCP), an open standard that lets shopping data such as stock levels, pricing and loyalty perks flow between Google's surfaces and outside merchants. The Universal Cart sits on top of this: shoppers can add items from different retailers, and Google automatically tracks price drops and back-in-stock alerts. If you run an online shop, getting your product data into this system is becoming essential.
So is SEO dead after Google I/O 2026?
No. SEO is not dead. AI Mode and AI Overviews still pull their answers from real websites, and the businesses that already do good SEO are the ones being quoted. Reporting around the event noted that a large share of the sources AI Overviews cite already rank in the top ten normal results. In other words, strong traditional SEO remains the best predictor of whether AI will mention you.
What has changed is the goal. It is no longer enough to rank. You now also want to be named inside the AI answer, because that is increasingly where the click, or the action, happens. Research shared around the event suggested brands cited inside AI Overviews can earn meaningfully more clicks than rivals who are not mentioned.
The honest downside: fewer clicks
It would be misleading to pretend this is all good news. When an AI summary answers the question on the page, fewer people click through to a website. Independent studies have shown organic click-through rates dropping sharply when an AI Overview appears, even for the top result. You may already be seeing this in Google Search Console: impressions holding up or rising, while clicks and click-through rate fall.
This is the "zero-click" trend, and it was accelerating before I/O. The realistic response is not to fight it, but to adapt: make sure that when you do get seen inside an AI answer, your brand is the one named, and that the clicks you do earn go to pages that convert.
Three things to do on your website this quarter
- Answer real questions clearly and early. Put a direct, quotable answer in the first paragraph of each page, then expand below. AI tools love clean, self-contained answers they can lift and credit.
- Tidy up your structured data. Clear pricing, product details, opening hours and FAQs in proper markup make it far easier for Google's agents and shopping tools to use your information correctly.
- Build your brand as an entity. Consistent business details across your site, Google Business Profile and trusted directories help Google recognise you as a real, citable source rather than just another page.
[INTERNAL LINK: guide to answer engine optimisation / showing up on AI]
Frequently asked questions
When were Google I/O and Google Marketing Live 2026 held?
Google I/O 2026 took place on 19–20 May at the Shoreline Amphitheatre in Mountain View, California, with the keynote on 19 May. Google Marketing Live followed on 20 May, with a regional EMEA event the next day.
What was the biggest announcement for SEO?
The combination of AI Mode reaching one billion monthly users and the launch of always-on information agents. Together they signal that search is becoming continuous and conversational, not a single search at a single moment.
Do I need to pay for new tools to keep up?
Not necessarily. The fundamentals (clear content that answers real questions, clean technical setup, and a recognisable brand) cost nothing extra and remain the strongest foundation for both normal search and AI search.
What should I track now instead of just rankings?
Watch your impressions-to-clicks gap in Search Console, and start monitoring whether your brand is mentioned in AI answers for your key topics. Being cited is becoming as important as ranking.
The events of May 2026 confirmed the direction of travel: AI is now the front door to Google, not a side feature. The good news is that the work that wins in AI search (clear, trustworthy, well-structured content) is the same work that has always won. The brands that treat this as a reason to sharpen their content, rather than panic, will come out ahead.
