Your profile is what colleagues and students see: your name and your picture.
Updating it
Click your name at the bottom of the sidebar and choose Settings. The settings pages are listed down the left: Account, Profile, Security settings, Email preferences, Accessibility, Agent preferences, Integrations, Classroom Sync and Billing.
Open Profile. Change your name, or click Upload an image to add a picture. Supported formats are .png and .jpg.
Save when you are done.