Is Genshin a free world game?

I'm curious to know, is Genshin Impact truly a free-to-play world game? Many titles in the market claim to be free but end up with hidden costs or limited access. Does Genshin offer a full gaming experience without any significant barriers or costs to entry? I'm interested in hearing about the monetization model and if there are any paywalls that could hinder my enjoyment of the vast world it promises.