via Wikipedia infobox
Notifications (commonly called pinging, formerly known as Echo) is a system designed to inform users about new activity on Wikipedia in a unified way. Rolled out at the end of April 2013, it provides notifications to users for a number of events related to their account, including new talk page messages, edit reverts, mentions or links. It is intended to augment the Watchlist by highlighting key user interactions.
Notifications are displayed to the right of the username and user talk links in the top link bar of the page for logged-in users, displaying two icons, each with a number representing the number of recent notifications. Email notifications can also be set up for some or all types of notifications in the notification preferences.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).