Short answer - it raises the code quality.

True for both management process and software development. Here is why it is important.

If your company is good enough to write documentation then do it properly. Poor documentation is worse than absent documentation.

For the sake of the world, please, stop mixing http-status codes with your code.

Have you ever worked with a project that had hundreds and hundreds of @todos in the codebase? What is the first thought that comes to your mind when you see `Found 786 items in 492 files`? Would you like them to go away and let you be?