context.TODO() or context.Background(), which one should I prefer?

I'm currently working on migrating our code from global sign package to go mongo-driver, not sure where should I use context.TODO() and context.Background(), it’s really confusing, I know both it returns non-nil empty, so should I use context.Background() in the main function & init() functions? And use context.TODO() in other places? Can anyone help with this?

Trying to check to see which param should I use context.TODO() or context.Background().

context.TODO:

Code should use context.TODO when it's unclear which Context to use or it is not yet available (because the surrounding function has not yet been extended to accept a Context parameter).

context.Background:

Background returns a non-nil, empty Context. It is never canceled, has no values, and has no deadline. It is typically used by the main function, initialization, and tests, and as the top-level Context for incoming requests.

TODO is a placeholder to make it clear that the code should be updated with a more appropriate context in the future, but none is available yet. Background is used when such an indication isn't necessary and you simply need an empty root context with no values or cancellation. The values they return are identical; the only difference is semantic, in that one might scan code for TODO contexts (or use a linter to do so) as places that need to be updated/addressed.