Theme

A valid WordPress theme must include licensing details (e.g., GPL compliance), copyright and author info, version number, theme description, and ensure functionality for posts, pages, archives, and search. It should be compatible with WordPress features like widgets and menus, and meet accessibility and privacy standards.

Plug-in

The "required info" for a WordPress plugin includes key details in the header comment, like name, description, version, and author, for proper identification in the dashboard.

BOOKS

Widget

A "required info widget" in WordPress displays essential contact details (e.g., name, address, phone, email) in a sidebar or footer. You can use the "Contact Information Widget" plugin to add these details via the widget settings in your dashboard.