What is the owner parameter for?

Hi

I can see that the owner field is used in multiple places as a parameter or in the returned data. Also some endpoints like the teams endpoint require the org field. What is the significance of the owner field. If I had to guess I would say that the owner refers to the account (organisation or user) that that particular resource belongs to in the url. Am I correct?

Also, how do I get the owners from an installation resource. Right now, I can see that the installation resource returns an account object which has a login field which looks very much like the username or organisation name used in the urls. Is it fine to use that value as the owner value?