Technical SEO
Indexability
Indexability describes whether a page can be stored by search engines and become eligible to appear in search results.
Indexability is the eligibility layer of SEO. A page can be discovered and crawled but still excluded from the index because of directives, canonicalization, duplication, quality, or technical errors.
Useful indexability checks include robots directives, canonical tags, response codes, rendered content, duplication, and internal links.