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.
Questions specific to elementary OS 0.4, codenamed "Loki".
Questions specific to elementary OS 0.3, codenamed "Freya". Freya has been superseded by Loki.
Questions about installing elementary OS in any supported architecture. Post-installation questions should not be under this tag.
Questions specific to elementary OS 5.0, codenamed "Juno".
Questions specific to elementary OS 5.1, code name "Hera".
for questions about updates and issues after updating
Questions about the bootup process in elementary OS. Use this tag if you have trouble booting elementary OS or you have questions about the bootup process.
Settings are options in a program that allow you to configure the program to suit your needs.
should be used for display and video related issues. Questions about hardware issues and what display to buy are off-topic.
WiFi is a networking technology permitting the exchange of information through wireless (radio) connections.
Questions about the default file manager, Files (also known as Pantheon Files), which can be used to perform all file management tasks, including accessing the entire file system.
Questions about wingpanel, the bar that appears at the top of the screen. This includes both regular usage, and customization.
The elementary OS app store (replaces the Ubuntu Software Center).
Questions about software that runs on elementary OS. This includes the default applications like Files and Mail, and also apps from the software center and those downloaded manually.
Questions about installing software, either as binaries or from source code, as well as using the Software Center.
For questions regarding the function of the entire operating system and issues that affect users system-wide.
Greeter is the operating system's lock/login screen. It is handled by the LightDM display manager and known as "Pantheon Greeter" in elementary OS, though other greeters are available.
for networking and internet related issues in elementary OS
Questions about keyboard shortcuts: both which ones to use and how to create custom shortcuts.
Questions about keyboards, both touch and otherwise. However, please add the "touchscreen" tag for touchscreen keyboard questions.
Terminal is the elementary OS app for entering text commands, formally known as Pantheon Terminal. For the Ubuntu terminal, use "gnome-terminal".
For questions regarding the installation of two or more operating systems on a single computer.
Questions about issues relating to drivers on elementary OS.
Questions about the graphics driver — system software that controls a computer's video adapter (aka graphics card) or GPU.
Desktop is a set of unifying concepts used by graphical user interfaces to help users more easily interact with the computer.
Questions about sound issues with elementary OS spanning from sound cards, microphones and speakers/headset to the transfer of audio signals via audio port, bluetooth and HDMI.
Plank is elementary OS's default dock. It shows active applications and is usually found at the bottom of the screen.
GRUB is the GRand Unified Bootloader, a BootLoader that can be used to boot most operating systems.
Questions relating to NVIDIA GPUs on elementary OS.
Questions related to the configuration and activation of touchpad / trackpads.
Questions related to Suspend Mode, which is a special low-power mode often used on laptops that preserves the contents of RAM while using less power than normal.
Questions relating to Pantheon, elementary OS's desktop shell.
Advanced Packaging Tool, the package manager for Debian-based distributions. It is also the most used tool for installing packages in Ubuntu. Questions about using any of the apt tools should use this…
for issues relating to Bluetooth on elementary OS
For questions concerning the elementary OS kernel (which is the same as Ubuntu's kernel), including compiling, and questions relating to modules
default email client in elementary OS (formerly known as Geary)