(Google MAIL) Google's free Web-based e-mail service, which is supported by text advertising similar to Google's Web search. Launched in 2004, Gmail offers 4GB of mailbox storage, allowing users to keep their mail on Google servers indefinitely for future reference. Gmail provides sophisticated searching of message content and keeps message threads for easy review. In 2006, Gmail chat instant messaging was integrated with the e-mail, also taking advantage of the same save and search features. Gmail is included in the subscriber-based G Suite service but without advertising. See G Suite, Gmail Tap, Gmail labels, Gmail tabs and Google.