WebFinger allows you to be discovered on the web using an identifier like [email protected] — similar to how email works, but for your online identity.

Why is this useful?

Fediverse & Mastodon: WebFinger is essential for federation. It allows Mastodon and other ActivityPub-powered platforms to find and follow your WordPress site.
Decentralized Identity: People can look you up using your WordPress domain, making your site the canonical source for your online identity.
Works with other plugins: This plugin provides the foundation that other plugins (like the ActivityPub plugin) build upon.

How it works:

When someone searches for @[email protected] on Mastodon or another federated service, their server asks your WordPress site: “Who is this person?” WebFinger answers that question by providing information about you and links to your profiles.

Technical details:

WebFinger is an open standard (RFC 7033) that enables discovery of information about people and resources on the internet. It works by responding to requests at /.well-known/webfinger on your domain.