Well each different game type has a different skill number connected.
Playing any unranked games, or social games, like social slayer or rumble pit won't bring up your numbered ranking.
To do this you must play the certain game type (ranked) with the number ranking. You will notice by seeing a number on the side on certain game types.
You mostly rank up by how well you and your team does, but also on how you individually do.
THe easiest way to rank up is by playing Lone Wolves if you are not a very steady player or you are good playing alone.
Team slayer will help you rank up quick, just get some friends and almost every game you win you will go up a number. Once you get around 20, it takes more games though.
I hope this helped
