"Beats per measure" refers to the number of beats contained within a single measure of music. A measure, also known as a bar, is a segment of time defined by a given number of beats. This concept is fundamental in music theory, as it helps musicians understand the structure and rhythm of a piece. Common time signatures, such as 4/4 or 3/4, indicate how many beats are in each measure. In a 4/4 time signature, there are four beats per measure, while in a 3/4 time signature, there are three beats per measure. The first beat of each measure is typically emphasized, creating a sense of rhythm and flow. Understanding beats per measure is essential for musicians, composers, and anyone involved in creating or performing music.