Duplicate title or description across the site

Across all live pages we look for identical <title> values and identical meta descriptions. When two or more pages share a value, every page in that group gets the finding; there is no reason to declare one of them the correct one. The report names which field is involved and how many pages share it.

The comparison is an exact string match. Two titles differing by one character do not count as duplicates, even if they are indistinguishable. Unlike STR-03 (core set, titles only and case-insensitive), SEO-03 watches both fields, so one page can get both findings.

It is evaluated on a sample crawl too, unlike ACC-06 or SIT-01. That is deliberate: duplication among pages we actually visited is a valid observation regardless of how many other pages we never fetched. We are stating something about what we saw, not about what we did not.

What the check does not do: it does not judge whether duplication is appropriate (pagination legitimately has it), it does not find similar-but-not-identical values, and it does not say which page should keep the title. The finding is page-level; severity is warning.

For visibility in AI answers we have no documented effect, hence the “effect not demonstrated” class. Of all the SEO codes, though, this one is the strongest, and it is worth saying why.

The title is one of the signals Google uses to decide which of several similar pages is the canonical one. It documents that itself, under duplicate content. When ten pages share a title and a description, you are saying they are interchangeable, and nine of them may end up out of the index as duplicates.

And that does connect to AI, if indirectly: being in the index is a necessary condition for appearing in Google's AI features. Duplication itself will not change your visibility in answers, but a page that never makes it into the index has no chance at anything.

The practical conclusion: take duplicate titles seriously and duplicate descriptions as housekeeping. And before you start rewriting, check whether the cause is in a template; it usually is.

Go through the groups the report lists and find the cause. There are usually three, each handled differently:

1. The template never inserts the page name and prints only the site name. One template change fixes the whole site at once.
2. Pagination: ?page=2 onwards shares the title with page one. Put the page number into the title.
3. Filters and sorting: parameter combinations mint hundreds of URLs under one title. Here the answer is a canonical pointing at the unfiltered version (SEO-04), not rewriting titles: those pages are not meant to be in the index separately.

What to watch out for: distinguishing titles by appending a number is not enough if the pages really are interchangeable. When “Products - page 2” differs from page 1 only by its listing, the problem is not the title but that those URLs compete for the same thing. In that case the right move is a canonical or removal from the index, not cosmetics.