When you have multiple commits and you want to clean them up before push your local branch, you can merge them into one.

For example, squashing last 3 commits in to 1.

git rebase -i HEAD~3

-i = interactive

This command opens an interactive window. Pick a commit (usually it would be the last one) then squash the rest.

Leave pick to the last commit, then write squash to the rest of commits.

e.g.

pick e8ce13 Accessibility fix
squash 4673ee Updating title
squash 43c543 Changing colors

Then save the file. Now, another window opens. Edit the commit message for picked commit.

Then save the file. Done.

Limit this when you are the only person working on the branch because it is changing commit history