OF COURSE it's more complex than this, the human's brain is a very sophisticated machine. But I just read a couple of "brain for dummies" books[1][2], so my knowledge is pretty limited.
[1] - "Behave" by Sapolsky
[2] - The Willpower Instinct
From that I recall they explain that the reward system responds to feeling of novelty because it's good for survival, f.e. you can find food or water source in a new location or maybe notice a hostile animals there. So, it's a behaviour caused by evolution. Twitter, Facebook, etc. just exploited it. And they admitted it:
[1] - "Behave" by Sapolsky [2] - The Willpower Instinct
From that I recall they explain that the reward system responds to feeling of novelty because it's good for survival, f.e. you can find food or water source in a new location or maybe notice a hostile animals there. So, it's a behaviour caused by evolution. Twitter, Facebook, etc. just exploited it. And they admitted it:
https://www.theguardian.com/technology/2017/nov/09/facebook-...