A sharp, often referred to as a "sharp note," is a musical symbol that raises the pitch of a note by a half step. It is represented by the symbol ♯ and is commonly used in various musical scales and compositions. When a note is sharped, it sounds slightly higher than its natural counterpart, which can add tension or brightness to the music. In the context of music theory, sharps are essential for creating different keys and harmonies. For example, the key of G major contains one sharp, while the key of D major has two. Understanding sharps helps musicians read and perform music accurately, enhancing their overall musical experience.