A song is a short poem or other set of words that is put to music and intended to be sung. Songs can be sung by one person or by multiple people, either a cappella (without instruments) or with instrumental accompaniment. Written lyrics can be composed specifically for the song or a pre-existing poem can be set to composed music; the latter is known as an art song. Songs can have a variety of purposes, from acting as an emotional outlet for people to serving as cultural artifacts and catalysts for social transformation.
A typical song consists of different sections that serve specific functions: the intro, verse, chorus, and bridge. The intro serves to catch the listener’s attention and draw them into the song. It can be as simple as a bar or two of instrumental music that introduces the theme and style of the song, or it can be more elaborate in its melodic and harmonic content.
The verse serves to tell the story contained in the song’s lyrics. This section is usually repeated, allowing the listener to become familiar with the song’s narrative and character development over time. It can also act as a transition to the more musically and lyrically dynamic chorus.
The chorus is the climax of the song, and the part that most listeners will remember and identify with. Often it will feature a catchy melody and memorable lyrics, and it will highlight the most important message or emotion of the song.