Wikipedia and Wikidata checker

No, and Wikipedia has its own notability rules. Wikidata entries also have notability rules, so check them before you add one.

Enter a domain to see whether Wikidata lists it as an official website, and whether that entry links to English Wikipedia.

Wikidata is an open knowledge base of people, companies and products. Linking an entry to your official website ties that entity to your domain.

This tool searches by the domain's name and keeps only entries whose official website matches, so a brand with a different name can be missed.

Questions

No, and Wikipedia has its own notability rules. Wikidata entries also have notability rules, so check them before you add one.

No. It helps identify your brand, but citations also depend on your site's authority and on what people ask.