What is AI search?

AI search is one of the most interesting AI applications and a transformative type of AI in digital marketing in a decade, offering a smarter way to connect people with what they need. Instead of matching keywords to pages, it uses artificial intelligence and AI models trained on massive datasets and high-quality training data (large language models, natural language processing, and machine learning) to understand what someone actually means, and to deliver an answer that’s relevant, contextual, and often immediate.

That’s the working definition. The deeper, more exciting shift is what it means for brands. Search used to be the way customers arrived at your site. Increasingly, it’s the way they decide whether they need to. AI search engines, AI Overviews, and conversational answer engines powered by generative AI, including open-source models and proprietary systems like ChatGPT, Gemini, and Claude are resolving questions inside the search experience itself, often without sending the user anywhere. Being represented inside those answers is where the brand decision is being made, and where the brands that move now will lead.

A note on terms. You’ll see “AI search,” “AI-powered search,” “smart search,” and “answer engines” used interchangeably, alongside the wider family of generative AI tools reshaping how customers find information. They all describe the same shift: from matching strings to delivering answers.

In April 2025, OpenAI’s ChatGPT became the fifth most visited website in the world, with 5.14 billion visits, up 182% year over year, and the only major platform still accelerating month by month. The market is reorganizing around answer engines fast, from the smallest startup to the largest enterprise, and the customers your brand is trying to reach are moving with it.

AI Overviews, the AI-generated summaries that sit at the top of search results, often above any link, now reach 2 billion monthly users, up from 1.5 billion just two months earlier. That’s nearly a quarter of the planet seeing AI-generated answers in their search results.

The search experience your customers grew up with (ten blue links, one query at a time) is being reimagined as a conversational, summarized, answer-first interface.

Most of the difference between basic search and AI search comes down to one capability: AI search understands what you mean, not just what you typed. Half a dozen technologies are doing that work in concert, and the way they fit together is genuinely clever once you see it. The ones worth knowing:

• Large language models (LLMs): the foundation. Built on deep learning, LLMs are the AI models that let generative AI systems read a question in natural language, draw on the structured and unstructured content they’ve been trained or grounded on, and produce an answer in fluent prose.
• Natural language processing (NLP): the layer that picks up nuance. NLP grasps query content from multiple sources, identifies synonyms and the relationships between words, and powers voice search and conversational queries, the messy, human way people actually ask things.
• Machine learning (ML) algorithms: the layer that learns. ML algorithms, including the deep learning models powering today’s most capable systems, adapt to user preferences, pick up on changing trends, and keep search results current rather than stuck on the ranking algorithms a team agreed on six months ago. This is where the real data science and problem solving happens, day in and day out.
• Semantic search: understands the context and meaning of words and phrases, not just their literal match, by combining NLP and ML. The reason AI systems can answer a question your customer hasn’t quite figured out how to ask.
• Entity extraction: finds and classifies elements inside text (people, products, places, prices) so the AI can connect content to the right query. Quiet problem solving that makes every other layer sharper.
• Faceting and filtering: built for precision inside vast data collections, so users can narrow an answer when a single response isn’t enough.

All of this depends on something the search bar doesn’t show you: the structure and quality of the content the AI is drawing from. AI-powered search engines reward high-quality content that’s been organized, labeled, and made legible to the automated systems doing the reading.

Zero-click searches are searches where the user gets the answer directly on the results page, without clicking through to any website. Google has supported this behavior for years with featured snippets, answer boxes, and knowledge panels. AI Overviews have turned it from a feature into the default, and into a far more interesting opportunity than the old click-through game ever did.

Two pieces of real-world data sharpen the picture:

• According to BrightEdge, impressions are up 49% year over year, but click-through rates have dropped 30%. More people are seeing your brand. Fewer are clicking through to it.
• A study by Ahrefs found that 99.2% of keywords triggering AI Overviews are informational in nature. The exact queries content marketers have spent a decade ranking for are the ones being answered inside the summary, by generative AI systems pulling from whatever content they can find.

The Pew Research Center has the user-side data: people who encounter Google’s AI summaries are less likely to click on a link, and more likely to end the session entirely.

Ranking number one isn’t the win it used to be, but the new game is more interesting. The question isn’t whether your content gets indexed. It’s whether it gets quoted, summarized, and credited inside the AI answer the customer actually reads, and represented accurately across AI agents, answer engines, generative AI models, chatbots, and the third-party channels that shape modern search.

Here’s the genuinely good news: AI search and generative AI reward content discipline, not gaming. The following strategies compound beautifully when content, data, and governance live in one place. AI search punishes fragmentation: every place your content lives in isolation is a place the brand can drift in the answer.

The implication runs deeper than search strategy. The teams that win in an AI-first search world are the ones whose content operation is built for it, and the build is more achievable than it looks. Consider the below shifts to decide whether yours is ready.

Structured content, by default

AI search engines reward content that’s organized, labeled, and modular: the kind that can be lifted, summarized, and re-assembled. With each round of AI model advances, long-form pages with no semantic structure get represented less accurately by the AI-powered tools reading them, less often. Structured content models built into the CMS are the foundation, not an SEO add-on. This is content-side problem solving for marketing teams that pays back every time an AI summary appears.

Governance that holds across every surface

When AI summaries pull from multiple sources, brand voice and message consistency stop being a campaign problem and start being a content infrastructure problem. The more places your content shows up, and the more AI-powered systems pulling from it, the more ways the brand can drift in the representation. Governance by design, not by retrofit, is what protects the brand at the moment of the answer, and supports the decision making that follows.

Real-time signals, connected to content

The brands clearing the AI search bar are the ones whose CMS uses automated signals to know who’s reading, what they’re looking for, and what to surface next. AI search is conversational, contextual, and personalized; a content stack that can’t keep up will get represented as a generic version of itself.

Content, data, and personalization in one platform, not stitched together after the fact: AI search is the latest, and possibly the most exciting, reason the connected approach wins.

Picture the journey a single customer is on right now. They start in a chat with an AI assistant. They drift to Google and land inside an AI Overview. They tap through to your site on their phone, then finish on a laptop a day later. At every step, an AI is forming an impression of your brand on their behalf, often before a human in your team has had a chance to weigh in.

SitecoreAI is built for that reality. When an AI is forming brand impressions across surfaces you don’t control, the only way to stay in the story is to make sure your content, your data, and your governance are connected on the surfaces you do. The platform is engineered to do exactly that.

Start with the layer the AI actually reads. Your CMS structures every page so it can be lifted, summarized, and quoted by AI search engines, AI Overviews, and the conversational interfaces customers are already using. Your digital asset library keeps the supporting assets organized, governed, and reusable, so the brand shows up consistently across every channel an AI might pull from.

Around it, Content Operations connects planning, workflow, and delivery so the brand reaches every channel, and every AI agent representing it, in step. Audience and Insights turns customer signals into a unified profile, the 360-degree view that powers real-time personalization. And Conversion Optimization puts that intelligence to work wherever the customer shows up.

AI-driven discovery isn’t a challenge to wait out, it’s a spark for innovation, and an opening for brands willing to deliver meaningful, immediate value at the exact moment a decision is forming. Lean in, and your content isn’t just found. It’s trusted, shared, and remembered, inside the answer the customer actually reads.