Find the zero-width characters and watermarks hiding in pasted text, and strip them.
This strips invisible characters and normalises punctuation. It does not make machine-written text read as human - that is an editing job, not a find-and-replace. Anyone selling you the opposite is selling you a find-and-replace.
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.
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.
Produce valid JSON-LD for the types search engines actually use.