Move the white edge pieces to the white center in their correct place based on colour, as shown in the image above
The first two layers (F2L) of the Rubik's Cube are solved simultaneously rather than individually, reducing the solve time considerably. In the second step of the Fridrich method we solve the four white corner pieces and the middle layer edges attached to them. Pairing up groups of edges and corners. Corners that have 1 white corner and 2 other colours are the ones the ones you should be looking for, then find the edge piece that has the same 2 colours as one of the white corners. You would then insert into the correct place in between the white edges and center pieces.
To complete this step, you need to learn all 57 OLL algorithms, complete this and it will bring you onto the last and final step to solving the Rubik's cube.
For this step, you will also have to learn algorithms. Though this time, it is only 21 total algorithms.