The title of the song is a reference to the term hook: "A hook is a musical idea, often a short riff, passage, or phrase, that is used in popular music to make a song appealing and to "catch the ear of the listener". The lyrics are a commentary on the banality and vacuousness of successful pop songs, making "Hook" both a hit song and a satire of a hit song.

The chord progression of "Hook" is very similar to the basic structure of Pachelbel's Canon in D, (D-A-Bm-F#m-G-D-G-A, or I-V-vi-iii-IV-I-IV-V). This chord progression is very widely used in popular music, often as the hook, leading to other satirical takes on the use of this chord structure.

There are several allusions in the song, one to the story of Peter Pan and his nemesis Captain Hook "no matter how much Peter loved her, what made the Pan refuse to grow, was that the Hook brings you back".

The song's lyrics, aimed directly at the listener, assert that the lyrical content of any song is effectively meaningless, as the song's musical hook will keep listeners coming back, even if they are unaware of the reason. In the introduction, John Popper sings:

This is followed by more lyrics about how he has nothing to say. These lyrics are a satirical take on the formulaic way popular music is generated. Further on in the song however, the lyrics become even more blatant, claiming that formulaic music is an easy way to make money "When I’m feeling stuck and need a buck/ I don’t rely on luck, because/ the hook brings you back...”

The musically "lazy" chord structure viewed in combination with the meta-lyrics reveal the true extent of the song's "genius": "the commentary is a big joke about how listeners will like just about anything laid on top of the chords of the infinitely clichéd Pachelbel canon, even lyrics that openly mock them for liking it."

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Wikipedia