Where to use heroku keys add command

Question

I've recently started working with ruby on rails and this heroku keys:add command comes up quite frequently when I search about heroku. I want to know what it is and where and when to use it?

Answer 1

You can use it to upload your git public key if you're using SSH instead of HTTP.

If you don’t already use SSH and if you want to use SSH Git transport on Heroku, you’ll need to create a public/private key pair to deploy code. This keypair is used for the strong cryptography and that uniquely identifies you as a developer when pushing code changes.