Slow response
What it means
These URLs took longer than 1000 ms to respond. Server response time is the floor under every other speed metric: nothing on the page can start until the first byte arrives.
How to fix it
Look for the usual culprits: an uncached database query per request, a slow call to a third party made during rendering, or no page cache at all. Measure where the time goes before optimising. Note that this is server time only, measured from a local crawl. It is not a Core Web Vitals score.
Finding it in CrawlStat
After a crawl, open Issues and pick Slow response. Click Show all in Pages to filter the Pages table to the affected pages, or Export affected to hand the list to whoever owns the fix. Audit ID: slow_response.