Gmail saves all mail in one box, but you can add labels that allow you to sort your Gmail conversation threads. For example, when a new thread starts with a received mail, the label "Inbox" is automatically added to the thread. By then adding the label "travel," all threads with "travel" are shown in a list.
- Tap > > Gmail.
- The inbox opens.
- Touch and hold a conversation thread to add a checkmark to it, and then tap > Move to.
- Tap a label for the thread, and then tap OK.
- The thread is added to the selected label.