WWE or the old WWF later changed their name to WWE is really a pro fake. Yes it is a professional acting and are pre-planned shows. The winners are decided even before a month while they have their rehearsals. If they fight in such a way as seen on TV then they won't be able to come again for the show. But injuries are real sometimes as this is a stunt performance. But not at everytime.
The WWE shows are aimed to generate revenue through ads, WWE products, games and various licensing under their brand name.
Anyway don't try this at home, hehe!