A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
Subscriber identity module. A small card you put in your phone.
e.g. verify a SSL connection and to authenticate a device on an enterprise network.
the keyboard dictionary, used for word suggestions and autocorrect
Microsoft's music and video player on Windows Phone.
Microsoft's search engine.
For questions related to attaching files, photos, etc... in email, SMS, MMS and other similar applications.
For questions relating to the built-in Office application
The Mac software for managing your phone.
Kidproof your phone in a way your kids will love
NFC means Near Field Communication. It includes technologies like Bluetooth, Infrared (outdated now) and WiFi.
Questions related to the built-in Battery saver app used to conserve battery.
For questions related to Groove app or Groove music services by Microsoft.
Questions about a specific file format, like how to open it on Windows Phone
Question especially related to VPN setup, configuration and usage.
For questions related to setting up and using Apps Corner and its features.
An app you can use to share pictures and videos with your friends.
An operating system by Microsoft.
Help to save you data plan by monitoring yours cellular data connection.
For questions related to usage, errors and behaviour of navigation keys present in navigation bar or navigation buttons.