Tooltip Demo 4
Clicking the Spec Icons allows you to change specs quickly, as well as ignore them. Ignored specs will not be displayed, but caching resumes in the background.
KeybindsDemo1
Keybinds can be assigned to use detected artifact power items or hide the addon. Display features can be toggled individually as well.
Relic Recommendations Demo
Recommends estimated "best" relics (based on icy-veins.com) - this is more for the casual player and can obviously be disabled.
SlashCommandsDemo1
This is just an example list of the ingame commands - new commands are frequently being added and this is unlikely to be up-to-date :)