If you want to be easy accessible on Steam, you need to set up a custom URL. This is quite easy and can be done on your profile page here: https://steamcommunity.com/id/me/edit.
After that, use the name you enter for your custom URL as your username. Now people can go straight to your profile and add you as a friend.
As a man or woman stranded naked, freezing and starving on the shores of a mysterious island called ARK, use your skill and cunning to kill or tame & ride the leviathan dinosaurs and other primeval creatures roaming the land.
Hunt, harvest resources, craft items, grow crops, research technologies, and build shelters to withstand the elements, while teaming up with or preying upon hundreds of other players to survive, dominate... and escape!