Strumming a guitar is a technique used by guitarists to produce sound. It involves using a pick or the fingers to rapidly move up and down the strings of the guitar in order to create a rhythm. Strumming is an essential part of playing the guitar, as it is used to create the melody and accompaniment for songs. The term 'stroke a guitar' is often used interchangeably with 'STRUM a guitar, ' as both terms refer to the same technique.