Enabling IMAP lets you seamlessly sync your Gmail inbox with your iPhone, iPad or iPod Touch so that you can manage your email wherever you are. To make sure IMAP is enabled, click the gear icon at the top right of your inbox and choose "Settings," then click "Forwarding and POP/IMAP." Make sure the "Enable IMAP" radio button next to the "IMAP Access" heading is selected and click "Save Changes." The rest of the steps will take place on your mobile device. Open the "Settings" app on your Apple device and tap "Mail, Contacts, Calendars." Tap "Add Account..." and choose "Gmail." Enter your account information, then tap "Next." On this screen, make sure the "Mail" switch is set to "On," then decide whether or not you want your iPhone's Calendar and Notes to be saved to your Gmail account. Tap "Save." Now, any action taken in your iPhone's Mail app will be replicated online as well, creating streamlined and consistent communication.