Google Contacts integrates with all G Suite apps enabled for your domain, such as Gmail, Calendar, and Docs, by supplying contact information to the autocomplete function used in each of these apps.
When a user begins typing into an address field within any G Suite app, a list of matching contact names automatically appears. This list narrows as the user types more letters into the field. The user can then select any address from this list, and the full address automatically fills the field. For example, you may see the autocomplete feature in the:
- To, Cc, and Bcc fields when composing a message in Gmail
- Add: Guests field in a Calendar event
- Add people field when sharing a Doc
- Chat application.