Check a page for skipped levels, missing H1s and the outline crawlers actually see.
This checks one page, once. The agents check every page, every week, and fix what they find.
Build reciprocal hreflang tags for every language version of a page, and catch the mistakes that quietly stop them working.
Find the zero-width characters and watermarks hiding in pasted text, and strip them.
Write crawl rules search engines actually follow, with your sitemap wired in.
Inspect a live sitemap for the errors that keep pages out of the index.
See exactly what search engines and social platforms read from a page.
See how a title and description will truncate before you publish them.