Which stanza form did Shelley use in his famous poem ode to the west wind?

Percy Shelley's "Ode to the West Wind" is written in terza rima.

Terza rima is a complex Italian verse form that consists of three-line stanzas with an interlocking rhyme scheme (ABA, BCB, CDC, etc.). The poem's overall effect is one of flowing movement, mirroring the wind's own motion.