When you afk a certain number of games in a certain lapse of time you get place in low priority queue. Is similar to the dodge waiting one but if you cancel it the next time you start a game you still have to wait the whole duration.
ie: Dodge waiting 5min, i cancel and wait 1 min while doing runes, come back and 4min left
low priority, waiting 5 min, i cancel and wait 1 min while doing runes, come back and still 5 min left. it resets itself everytime you close it
It varies from 5 min to 30 min and while you are waiting your client is pretty much frozen and the only thing you can do is stare at the countdown since the rest of the functions and features are locked. You cant even chat lol.