Experience is the best teacher.
Promote this pawn to a queen. (A rook would also work, but I can't put multiple solutions.)
Get your pawn to the end, you can turn into a knight, bishop, Queen or a rook, I suggest you turn into a queen.
https://lichess.org/learn#/6
If you are playing white, somehow get your pawn to the 8th rank of the board, no matter which file it is, and do the vice-versa, if you are black.