Status codes

The HTTP response a URL returns, and core technical-SEO diagnostic literacy: 200 (OK), 301 (permanent redirect — passes signals), 302 (temporary redirect), 404 (not found), 410 (deliberately gone), 503 (temporary unavailability — the right code during planned downtime). A crawl report is mostly a table of these; the outliers are your fix list.

First used in: 2.3 · Technical SEO I — crawl & index control