How can I set up such that each cell can display when it was last updated?

I have a tracker which I use for all my projects for a specific category of work I do. I want to track the date for each of the stages of each projects. Currently, My option is to include one extra cell for each stage of the project and to make sure that the date is manually entered. But is there any option such that if you hover your mouse over the cell, It will show the last date a specific keyword like DONE was entered into the cell?