The conclusion of the song, which often mirrors the intro or brings the song to a close with a final statement by the band.
In general cierre means more than just the ending: it is a passage, usually by the full orchestra, that interrupts the ongoing rhythm. A cierre can fall in any section, including the middle of the montuno, and can mark the start of a new section. The last cierre of the song is the closer.
There is no fixed form, but you often hear one or more of these:
Live, the ending can last much longer than on the record. The singer or bandleader signals when the band moves to the coda.
Listen for the last cierre: try to time your figure so you finish together with the band, for example with a turn or a pose on the final hit.