im dono how to get rid of my buzz!!!

[marshmellomann]

ok if i let off my string theres a buzz and when i hit the back part of the fret there is buzz. is that normal fret buzz or what? is there anyway i cood fix it?but its only on some frets the back of the fret and when i let off the string? i dono maybe its ok and im just bein to picky? anything at all wood be great thanx