Rails: why is there a .keep file in every directory

Question

I see a .keep file in every directory in the rail framework.
what is this file for? What is its significance?

Answer 1

This is not for Rails in fact, this is for git.

Git does not track "empty" directories, therefore directories, for example, for example. "/ logs" will not get into the repository. Having .keep in it, the directory is tracked.