What is prop drilling? How many levels of nesting are considered acceptable?

Prop drilling is the process of passing data (props) through multiple levels of nested React components to reach the component that actually needs this data. This can lead to bulky and hard-to-maintain code if there are too many levels.

The acceptable number of nesting levels is not strictly regulated, but usually, if you have to pass props through 3-4 or more levels, it's worth considering alternative approaches, such as using React's Context API or managing state with Redux, MobX, etc.