Pre-made or user-made sets of rules that perform different actions on incoming or outgoing emails in Gmail.
Gmail's filters allows management of incoming messages. Using filters, a user can automatically do a number of things to a message, such as apply a label or mark it "important".
From Wikipedia:
Gmail allows users to create rules (‘filters’) for the automatic organization of incoming mail. Filters are created using the Advanced Search interface using the same criteria as those used for searching. Gmail can perform any combination of the following actions upon an email that meets all the specified criteria in a filter:
- archiving (i.e. removing the message from the Inbox)
- adding a star
- marking as read
- marking as important
- applying a label
- moving to the trash
- forwarding to another e-mail address
More information:
