Interesting read: [Wayback/Archive] Thread by @aakashg0 on Thread Reader App with this takeaway:
If you take away anything, remember this – the models take in 3 inputs:
• Likes, retweets, replies: engagement data
• Mutes, unfollows, spam reports: user data
• Who follows you: the follower graph
Read from the start at [Wayback/Archive] Aakash Gupta 
Product Growth Guy on Twitter: “Twitter revealed its algorithm to the world. But what does it mean for you? I spent the evening analyzing it. Here’s what you need to know:”
The algorithm is at [Wayback/Archive] twitter/the-algorithm: Source code for Twitter’s Recommendation Algorithm.
Via [Wayback/Archive] Andrea on Twitter: “Haha, dát is het dus!” / Twitter
Note: for me the only way to reliably follow people is this: [Wayback/Archive] Jeroen Wiert Pluimers @wiert@mastodon.social on Twitter: “@chrisbensen @geerlingguy @TwitterBlue @elonmusk @tweetbot About the only tweeps I see tweets from on a regular base is the ones I turned notifications on for. It does not matter if they are blue or not. The blue ones tend to post overly large tweets. Those I skip reading.”
–jeroen