Your account page contains information specific to you—like your password, the email address associated with your account, the number of credits you have, and your API key. If you're an owner of any workspaces, your account page also gives you easy access to manage the settings (including billing) of those workspaces, as well as workspace and base collaborators.
To get to your account page, click the circular face icon in the top right of the home screen. This will bring up a dropdown menu with several options; select the Account option (which has a little silhouette of a head next to it).
This will bring you to the overview section of your account page. You can also go directly to https://airtable.com/account from a laptop or desktop.