Your profile page tells people the story of your work through the repositories you're interested in, the contributions you've made, and the conversations you've had.
Your organization's profile page shows basic information about your organization.
You can share information about yourself with other GitHub users by setting a profile picture and adding a bio to your profile.
You can add a README to your GitHub profile to tell other people about yourself.
You can pin gists and repositories to your profile so other people can quickly see your best work.
A private profile displays only limited information, and hides some activity.