If you have an account on Mastodon and want to add a link alongside your other social networks, this can be updated on your Commons profile.
Choose the green “Edit” button under your picture. In the column on the left, you’ll see a “Mastodon handle” option. Type your Mastodon handle into the box, using the format @USERNAME@SERVERNAME (Example: @platypus@hcommons.social). Save changes at the bottom of the page.

Please also see our detailed guide on editing your profile.