2 Look PLL( Permutation of the Last Layer)
PLL is the last step of the Fridrich Method. After you finish OLL, pieces on the last layer will need to be permuted (moved around). Find out which diagram indicates how you need to move them around, and apply the algorithm. Before you go off finding which case you have, use U/U'/U2 turns to align as many pieces as possible. Then one of the diagrams should match what you have.
Learning the 2 look PLL
You need all of the 21 algorithms below to solve this stage in a single step. However, if you are willing to do it in two steps instead, you can use what is called the 2look PLL. You then only have to learn 6 of them (at the expense of speed obviously). Now, down here is the algorithms that I mainly used, 2 look PLL.
Cycling 3 edges clockwise
perform this algorithm: R2 U R U R' U' R' U' R' U R'
Cycling 3 edges anti clockwise
perform this algorithm: R U' R U R U R U' R' U R2
Cycling 3 corners anti clockwise
perform this algorithm: x [(R' U R') D2] [(R U' R') D2] R2
Shooting edges to its opposite place
perform this algorithm: M2 U M2 U2 M2 U M2.
"M" stands for middle. It means you turn the middle towards you.
Shooting edges to its adjacent place
perform this algorithm: M2 U M2 U M' U2 M2 U2 M' U2
M' stands for middle counter clockwise. It means you turn the middle away from you..
Swapping corners to its adjacent place
perform this algorithm: x' [(R U' R') D (R U R')] u2 [(R' U R) D (R' U' R)]
x means rotating the whole cube clockwise/away from you.
x' means the opposite of "x'"
before you do any of this algorithms. you need to check the 3rd layer's corner stickers. you need to find one face with the corner stickers match. watch badmephisto's video in my video index for more info.