A drummer is a person who plays drums, drum sets, marching percussion
(en:Marching_percussion), hand drums (en: Hand_drum), cowbells, and so on.
For drummers, the word percussionist (English: percussionist), in a broad sense, means a percussion player, but is often used to refer to a classical or Latin percussion player.
Most bands that play rock, pop, jazz, etc. have drummers.
Their main role is to beat the beat, keep the rhythm, and play the fill-in between songs.
A drum set is a collection of percussion instruments such as drums and cymbals of various sizes, arranged in a way that a single player can play, and is not a name of a specific instrument but a concept. I usually sit on a chair and play. Mainly used in popular music. Drum kits, drums, drum sets are also called drums as a term for musical instrument parts and performers (drummers). Abbreviation is Dr., Ds. Or Drums.
The types and number of percussion instruments incorporated in the drum set vary depending on the player's preference, musical direction, economic circumstances, and the like. Although it is called a drum set (combination of drums), a percussion instrument such as a cymbal that is not a drum is incorporated into the set.