What makes a page eligible to be cited in one?

Being indexed and eligible to be shown in search with a snippet. That is the stated condition in full, and it means eligibility is inherited from ordinary search rather than being a separate qualification anybody has to work towards or pay for.

Should we buy help optimising for these?

Read the guidance first, which takes five minutes. It says there are no additional requirements and no special optimisations necessary, and that no new files or markup are needed - a plainer statement than most of what is currently being sold against it.

What actually changed for us, then?

Not how to qualify, but what a position is worth. Someone whose question is answered above the results has been served without visiting, so the value of ranking is now decided by how many readers still need the page afterwards.

Glossary

AI Overview

A generated summary shown above search results, which answers the question directly and links onward to the pages behind it.

In plain terms

A summary at the top of the results page that answers the question, with links to where the answer came from. Somebody who reads it and stops has had their question answered without visiting anybody, which is the part that changes the arithmetic of ranking.

Why it matters

Because a great deal of advice is being sold about how to appear in these, and the documented position is that there is nothing separate to do. Knowing that saves money and redirects the effort to the thing that does decide it.

How it works

Its purpose is stated as helping people get to the gist of a topic quickly and providing a jumping-off point to explore links. That is a summary with onward links, which is a different object from a results list and is placed above one.

Eligibility is inherited rather than separate. To be shown as a supporting link, a page must be indexed and eligible to be shown in search with a snippet, which means the qualifying condition is the one your site was already meeting or failing.

There is nothing additional to do, and the guidance says so directly: no additional requirements to appear, and no other special optimisations necessary. That is an unusually plain statement and it is worth reading before buying advice to the contrary.

No new files or markup are required either. The guidance is explicit that you do not need new machine-readable files, AI text files or markup, and that there is no special structured data to add for these features.

The links matter as much as the summary, which is easy to miss when reading about this. The stated purpose includes providing a jumping-off point to explore links, so the pages behind an overview are part of what is being shown rather than an alternative to it.

So the work that helps is the ordinary work. Being indexed, being eligible for a snippet, and being a page somebody would sensibly cite are what remain, which is the same list that mattered before and is less saleable as a service.

What changes is not how to qualify but what a position is worth. A reader whose question is answered above the results has been served without arriving, so the value of ranking well is decided by how many people still need the page after reading the summary.

What is being sold, and what is documented

Being fair about why the left-hand column exists: something genuinely did change, buyers can see it changing, and the demand for a response is real even where a separate technical answer is not. The honest version of the service is help with the ordinary work, which is unglamorous and still valuable - being indexed, being eligible for a snippet, and being a page that answers a question well enough to be worth citing. What deserves scepticism is anything presented as a distinct mechanism for qualifying, because the documented mechanism is the one that already existed. The change that is real sits on the other side of the ledger and cannot be optimised away: a reader served above the results has been served, so what a position is worth depends on how many people still need the page after reading a summary of it. That is a question about what your pages are for rather than about how they are marked up, and it is the more useful thing to spend an afternoon on.

Seen in the wild

A definitional question answered above the results, with the sources linked beneath.
Perplexity
Checking that a page is indexed and snippet-eligible, which is the actual requirement.
Glean
Advice offered on optimising for these features, against guidance saying none is needed.
Writer

Common misconceptions

People assume

There is a separate way to optimise for them.

In fact

The guidance states there are no additional requirements and no special optimisations necessary. Eligibility comes from being indexed and snippet-eligible, which is the same condition that governed ordinary results.

People assume

Special markup or an AI file is needed.

In fact

The guidance says explicitly that no new machine-readable files, AI text files or markup are required, and that no special structured data needs adding for these features.

Questions

What makes a page eligible to be cited in one?: Being indexed and eligible to be shown in search with a snippet. That is the stated condition in full, and it means eligibility is inherited from ordinary search rather than being a separate qualification anybody has to work towards or pay for.
Should we buy help optimising for these?: Read the guidance first, which takes five minutes. It says there are no additional requirements and no special optimisations necessary, and that no new files or markup are needed - a plainer statement than most of what is currently being sold against it.
What actually changed for us, then?: Not how to qualify, but what a position is worth. Someone whose question is answered above the results has been served without visiting, so the value of ranking is now decided by how many readers still need the page afterwards.