Learning how to read music is an essential part of playing the piano. If you don't know how to read music, you may be stuck trying to learn a difficult song by ear, which can be made a hundred times easier by reading the sheet music. Music is read by lines. There are 5 lines on the music score (2 sets of these on the piano). On the treble clef, the first line from the bottom is E, the second is G, B, D. A good way of remembering it is Every Good Boy Deserves Fudge. The spaces are F, A, C, E. FACE. On the Bass clef, the lines go as G, B, D, F, A. Good Boys Deserve Fudge Always. The spaces are A, C, E, G. Any Cow Eats Grass.
Music Originated a long time ago. The first notation were random dots on a page. We cannot tell the pitch of them. Slowly, it developed into one line, then the grand staff we see today.