Artificial intelligence is rapidly becoming the primary way people search the internet, with Google's AI-generated search summaries now appearing in nearly half of all searches, accelerating a fundamental shift in how users discover information and posing growing challenges for online publishers.

According to a new report from market intelligence firm Similarweb, Google's AI Overviews appeared in 43% of searches by May 2026, up sharply from 15% a year earlier. The findings suggest Google's integration of generative AI into Search has moved from an experimental feature to a central component of the search experience.

The rapid expansion reveals Google's determination to defend its dominance in online search as competition intensifies from AI-native services such as ChatGPT, Claude, Perplexity and other conversational search platforms. Rather than simply presenting users with a list of hyperlinks, Google's search engine is increasingly providing synthesized answers generated by artificial intelligence, allowing users to continue asking follow-up questions through AI Mode without leaving Google's ecosystem.

Last year, Google denied that its overview undercuts publishers traffic as debate over its impact accelerated. Last September, Penske Media Corporation (PMC), filed a lawsuit accusing the tech giant of illegally repurposing news content to generate AI summaries that undercut publishers' business models.

Similarweb's report indicates that AI Mode usage has grown rapidly alongside the broader rollout of AI-powered search.

Visits to AI Mode increased from 126 million in June 2025 to 279 million by May 2026, highlighting growing consumer acceptance of conversational search experiences.

The figures illustrate a profound transformation in internet search behavior. For more than two decades, Google's search engine functioned primarily as a gateway to the web, directing users to external websites where they consumed information.

That model is changing.

Increasingly, Google itself is becoming the destination, compiling information from across the internet and presenting AI-generated summaries directly within search results, reducing the need for users to click through to publishers' websites.

The change is also influencing how people formulate search queries. According to Similarweb, the average length of Google searches has increased over the past year, suggesting users are replacing short keyword searches with longer, more conversational prompts designed to obtain comprehensive AI-generated responses.

Instead of entering fragmented phrases such as "best electric cars 2026," users are increasingly asking complete questions or describing complex scenarios, reflecting habits that have become common on chatbot platforms.

The shift mirrors broader changes across the AI industry, where natural language interaction is replacing traditional keyword-based search.

For publishers, however, the transformation presents significant commercial challenges.

News organizations, educational websites and content publishers have complained that AI-generated summaries reduce referral traffic by answering users' questions directly within search results rather than encouraging visits to sources.

Last year, Similarweb identified declining referral traffic as one of the most significant consequences of Google's AI search rollout, particularly for news publishers whose advertising and subscription businesses depend heavily on website visits.

The issue extends beyond Google.

As AI assistants increasingly summarize information from across the web, publishers have lamented that technology companies are benefiting from their content without generating corresponding traffic or revenue. Those concerns have prompted parts of the publishing industry to seek new ways of protecting digital content.

Cloudflare recently introduced tools allowing website owners to block AI crawlers unless AI companies agree to compensate publishers through a licensing marketplace, reflecting growing efforts to establish commercial frameworks for AI content access.

Even as AI-generated responses become more common, citation practices continue to evolve. Similarweb found that the proportion of AI-generated answers containing citations has increased more than fivefold during the past year, suggesting AI platforms are becoming more transparent about the sources used to generate responses.

Even so, referrals remain relatively limited.

As of May 2026, only 6.8% of U.S. desktop ChatGPT queries included citations that directed users to external websites.

Citation frequency also varies considerably across industries. Travel, retail and sports-related searches are more likely to include links to external sources than many other categories, reflecting the greater need for users to access booking platforms, product listings or live information.

There are signs that referral traffic may be improving. Following a search update introduced on May 7, ChatGPT significantly increased the prominence of clickable links within responses.

According to Similarweb, the proportion of U.S. desktop ChatGPT searches resulting in visits to external webpages more than doubled, rising from 25% in March 2026 to nearly 60% by May 30.

The improvement suggests users are more willing to visit original sources when AI-generated responses include clearly visible citations and links.

Even so, the broader direction of travel appears clear.

AI is steadily changing the economics of search by shifting value from website discovery toward direct answer generation. Rather than acting solely as intermediaries that connect users with publishers, AI-powered search engines now synthesize information themselves, keeping users engaged within their own platforms for longer periods.

The strategy strengthens Google's user engagement, increases opportunities to monetize search through advertising, and reinforces its position against emerging AI competitors. For publishers, however, the transition represents one of the most significant structural changes since the emergence of search engines themselves.

AI-generated answers becoming the default interface for accessing information means media companies and other content creators now face growing pressure to develop new business models that are less dependent on referral traffic from traditional search.