There are also a large number of advanced search operators.
Gmail allows users to create rules (‘filters’) for the automatic organization of incoming mail.
Priority Inbox splits up the inbox into sections such as “Important and unread”, “Unread”, “Starred” and “Everything else” enabling a user to always see important items on the top. However, in another review for Lifehacker, Whitson Gordon calls Priority Inbox "one of Gmail’s most unsung features".
Gmail recognizes messages related by subject and groups them into "conversations" where messages in a back-and-forth string get collected together and appear stacked one after another, with the newest messages at the top. The number of messages in a conversation always appears in parentheses next to the names of people in the conversation.
A conversation will break off into a new thread if the subject line of a message is changed, or if the conversation reaches over 100 messages.
Replied or forwarded messages from some local (like local Yahoo!
Mail) accounts also split up conversations because their subjects contain parameters in the local language, instead of "Re" or "Fwd:".