Link Heroku app to Github repo. For what?

Question

Recently I saw this field in my heroku application settings.

Link your app to a GitHub repository to see commit diffs in the activity log.

Answer 1

It's subtle, but your activity log has changed. When you add a repository in Heroku settings, the commit hashes in your activity log turn into links to GitHub, like so:

Answer 2

If you want to see your code in Github you must add Github as a remote repository

git remote add origin https://git.heroku.com/repo.git
git remote set-url --add origin https://github.com/username/repo.git

Every time you push your commits they will push to both heroku and github

git push origin

Now when you click on the commit links, they will take you to github.