What are GIT stash and GIT stash drop?

It takes the current state of working directory and index and pushes into the stack for later and returns to you the clean working directory.GIT stash will help you in the instances where you are working on a project and you want to switch the branches to work on something else.

GIT stash drop:

When you are done and want to eliminate the stashed item from the list, then running the GIT “stash drop” command will remove the last added stash item by default and can also remove the specific item if any argument is included or mentioned.