Which of your links go nowhere?

Because it appears on several pages. We list one row per link per page it was found on, which is how you tell a one-off typo from a link in your header or footer. If a link repeats down the whole list, it is in a shared template and one fix clears every row.

Because the cost here is links, not pages. Every other audit reads pages we have already downloaded; this one makes a fresh request to every unique link and waits. Ten pages of a normal site is already several hundred requests to other people's servers, and we would rather do that properly than do triple the volume badly.

That happens. Some sites refuse automated requests, some rate-limit, some were briefly down when we asked. We report exactly what came back so you can judge. Check anything surprising in a browser before changing it.

No. A broken internal link is a page of yours that a visitor cannot reach, so it is weighted hardest. A broken external link is worth fixing but it is someone else's site that moved, and it says less about the health of yours.

This audit follows links, meaning anchors between pages. Missing images and render-blocking resources are the performance audit's territory, and both are pillars of the full site audit.

After any content migration or site restructure, and periodically otherwise. Link rot is gradual and invisible, which is exactly why nobody notices it until a customer does.