WAPP Author Hub enhances your WordPress site with a complete author-centric feature set:

E-E-A-T Author Box — Schema.org structured data (Person) on every post, improving search visibility.
Custom Author Page — Replaces the default WordPress author archive with a rich profile page showing avatar, bio, social links, stats and recent posts.
Subscriber System — Logged-in readers can subscribe to authors and receive email notifications about new posts.
Notification Bell — Front-end bell widget shows unread notifications for subscribed authors.
Email Digests — Automated or manually triggered digest emails sent to author subscribers; configurable frequency (daily / weekly / monthly).
Author RSS Feed — Per-author RSS feed link.
Login / Logout Button — Automatic SVG icon button added to the primary navigation menu.

Privacy

This plugin stores subscriber email addresses and user IDs in custom database tables on your own site. See “External Services” below for the one third-party service this plugin relies on.

External Services

This plugin relies on one external service to display author profile pictures.

Gravatar (by Automattic)

This plugin uses WordPress’s built-in get_avatar() function to display author profile pictures on the author box and the author page. WordPress core, by default, retrieves these images from Gravatar.com — this is standard WordPress behavior used by every theme and plugin that displays user avatars, not something this plugin adds independently.

What it is and what it’s used for: Gravatar (“Globally Recognized Avatar”) is a service that serves a profile picture associated with a person’s email address. It is used to display the post author’s avatar in the author box and on the custom author page.
What data is sent and when: Whenever an author box or author page is viewed, a cryptographic hash (MD5) of the relevant WordPress user’s email address is sent to Gravatar’s servers to retrieve the matching image. No plain-text email address is transmitted — only the one-way hash. This request happens automatically on every page load that displays an author’s avatar, for any visitor viewing that page (the visitor’s own data is not sent — only the displayed author’s email hash).
Terms of Service: https://gravatar.com/site/terms-of-service
Privacy Policy: https://automattic.com/privacy/