Like all major email providers, Gmail lets you keep an address book of contacts so you don't have to memorize everyone's email addresses. You can also add other contact information, like phone numbers, birthdays, and physical addresses.
To add a contact:
2. Click the Contacts button in the drop-down menu.
3. Your contacts screen will appear. Click the Add new contact button in the lower-right corner.
Enter the contact information, then click Save.
To edit a contact:
2. Locate the contact you want to edit, then click Edit Contact.
3. You can now make any changes you want to the contact.