For 20 years, the customer acquisition funnel stayed the same. A human searched Google, they saw blue links on the search results page, they clicked on a link, landed on your site, and converted into a customer. Now the customer experience is shifting with a growing share of sessions starting in agent apps like Gemini, and many of those sessions will never result in a visit to your site. Here's how it's shaking out for advertisers:
Your Customer Journey Has Branched
The old funnel was linear. The new one splits into two paths, and businesses need to win on both.
- Familiar path: Search engine → click link → visit site → convert on site.
- New path: The agent either handles the entire transaction in-app — this is already happening with ChatGPT's Instant Checkout[1] and Shopping Research — or it sends the customer to your site. Either way, the rules have changed. Customers arriving from agents are more informed and more intent-driven. They expect smart experiences, not static pages. And if agents can't find or understand your business, they won't recommend it at all.
Three Required Capabilities
This isn't a marketing tweak. It's a capabilities gap. Businesses now need three new layers that most don't have.
- Brand Discoverability. Structured data, JSON-LD, llms.txt[2], and content optimized for agent consumption. This is how agents find you and understand what you offer. Without it, you don't exist in the agent-mediated journey. SEO got you discovered by Google. This gets you discovered by agents.
- Agent Endpoints. MCP servers[3], A2A protocol support[4], and APIs that agents can call directly. This is how agents interact with your business programmatically, checking availability, understanding your catalog, completing transactions. Think of it as giving agents a front door to your business instead of forcing them to scrape your website.
- On-Site Intelligence. Agent chat, agent voice, dynamically generated content, and personalization for the humans who do visit. The customers arriving from agent referrals are better informed and more intent-driven. Static pages built for casual browsers don't convert them.
The Cost of Waiting
Most businesses are missing all three layers. They have a website built for Google and human browsers. Every month that passes, more customer journeys route through agent apps, and every month without these layers is lost demand that compounds. The organizations building this infrastructure now are capturing the early traffic. The ones waiting are optimizing for a funnel that's shrinking.
