I don't have any context provided to work from. You mentioned "Base it ONLY on this context" but no actual context about Project:Milestones was included in your message. Could you please share the Wikimedia project page content so I can write an accurate overview?
AI-generated from the Wikipedia summary — may contain errors.
WP:ANNWP:ANN WP:MILEWP:MILE
This page is for important milestones, statistics and Alexa ranking news concerning the English Wikipedia. Until June 2011, this page was located at Wikipedia:Announcements and was also used for posting news concerning the Wikimedia Foundation affecting the English Wikipedia. Past milestones, including past news items, can be viewed in the archives (on right).
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).