there are some universal cleats and some specified. for instance, the rb's usually have lower cleats and lighter weight, so they can cut easier. the lineman usually have bigger heavier more durable cleats to withstand all that work.

hope this helps

cleats change for each player, but yes there are for certain positions running backs and wide recievers would have lighter cleats. while linemen may prefer cleats with built in wide rubber spikes. even the spike size 1/4 etc can effect how a player might want to jump or land.

there are universal cleats, and there are specific cleats for each position. people that play multi positions often wear these universal cleats (in High school and sometimes college)

High top cleats extend beyond the ankles and usually are used by positions that need grounding, like linemen

Mid Cut are usually used by "skill positions"...like QBs (Mobilty and help when stepping up for passes) and RBs (running and blocking). these are the univieral cleats usually in high school because they are great all around.
unlike what Fish said, RBs wear mid cut, not small spikes. they need a somewhat deep spike in order to change directions faster.

Low cuts are lower and smaller spikes, are used by positons based on speed, like WRs and DBs

Well, most cleats are universal at the lower levels(popwarner and High school) but there are specific types like trench cleats(for liinemen) and the jukeing small cleats for skill postions.

I just wear the cleats that are football cleats nikes, under armer(click Clacks), reeboks, and maybe adidas

Yes they are. Check the ounces on them,the lighter they are, there probably for like WR,CB,RB,S and such. The ones that are high tops and have ankle support are usually for lineman and such.

it is not so much the cleats that you should be concerned about as far as position wise but ankle support...high tops for the o line, mid tops for running backs and low cuts for receivers, high tops for d line and mid tops for lbs and dbs...cleats do play a huge part in weather and turf conditions...shoes with replaceable screw on cleats is the clear cut choice...it costs twice as much as rubber molded cleats but is the better investment...last thing you want is a pair of cleats that you are stuck with an entire season and will wear down as the season progresses...1/2", 3/4", and 1" are the most widely used depending on the weather and turf conditions.....1" are best for rainy and muddy conditions....on normal conditions carry both 1/2" and 3/4" to the game.....start off with the 1/2" for the first qtr and 3/4" for the second...gauge what provided you with the best traction and go with that for the entire second half and change as the condition changes...always start with the shortest length first...worst thing could happen is having your cleats stuck in the turf as you absorb a hit....leg and ligament injuries are a *****....there are special shoes for astroturf and synthetic turf......