I'm the only runner in a game i recently requested and added to this community, but i don't know about Tags and Variables. Can someone explain to me how that works?

Tags are just information pieces to help those searching for a game by genre, or by developer and/or publisher.

Variables for setting other information things about runs and setting up subcategories. If you give information about what game and what you are trying to accomplish, I'd be happy to help if I can.