You can add all of the contact's basic information on this page. Please note that Lead Type, Lead Status, Lead Source, Language, and Tags are customizable user fields are configured under the Setup → User field section in the sidebar. For more information on customizing those fields, see this.

You can also add as many Email addresses and Phone numbers as you want. To do that, click the blue down arrow next to the Email or Phone field and select + Add new phone/email. All changes are automatically saved in this tab. The current time for the area code will be displayed if you enter a phone number.