this is mainly for new players who have noticed that others are walljumping, and powersliding.
Walljumping: this move is not very hard to learn, simply look at the ledge you wish to grab onto, look for another wall near it and run towards it- jump at the wall then jump again right before you touch the wall to perform a walljump.
Uptown is a great map to practice walljumping. if you really want to be excellent at walljumping, go into jump servers for better practice.
Anyone can move around quickly on many maps by using walljumps.
Powersliding: this move is extremely usefull for getting to another place quickly. the best way to perform a long powerslide is to gain speed by jumping and sprinting, then to slide, on the last jump you want to make, press crouch right before you land. i know this from personal experience.
Anyone can perform long powerslides even with the Negev, vest and helmet. i've done it several times and it is a little bit more difficult to master than walljumping. that depends on you whether if walljumping is harder, depends on the map and your experience.