Answer:
When a move is written down, the first capital letter shows which peice has moved
King = K
Queen = Q
Rook = R
Bishop = B
Knight = N
Pawn = no notation
It then shows which square it moved to.
c4 (a pawn moved to c4)
Ne5 (a knight moved to e5)
OTHER NOTATION
x = capture (Nxe5)
+ = check (Rh7+)
# = checkmate (Qa4#)
= = promotion (e8=R)
ep = en passant
0-0 = castles kingside
0-0-0 = castles queenside