Ask HN: How technically complex are social media algorithms?

[Gooblebrai]

I'm curious about the technical complexity of social media algorithms, specifically the ones driving the feeds on TikTok and Instagram. How complex are these systems? Are they a standard recommendation system and the complexity comes from the large amount of signals being used? Is it a fancy neural network?

[farhanhubble]

You can look at Twitter's recommendation system [here](https://github.com/twitter/the-algorithm) to get an idea.