GIT stash captures the current state of the working directory and index and keeps it on the stack for future use. It reverts the uncommitted changes (both staged and unstaged) from your working directory and returns you a clean working tree.
You can work on something else now, and when you come back, you can re-apply these changes. So, if you want to switch from one context to another without losing your current changes, then you can use stashing.
It is helpful in quick context switching, where you are in a mid-way of a code change that you don’t want to commit or undo it right now and you have got something else to work on. The command to use is git stash.
