Conga de comparsa is the street-carnival march of Santiago de Cuba and Havana: the comparsas parade to it, and the arrollao — the crowd's shuffling, stomping dance — rides on it. It is felt in a fast two.
How it sits: son clave, 2-3, in the clave layer. The campana (a brake drum, frying pan or cowbell; bell here) keeps a near-steady quarter pulse with a skip at the end of each bar. The snare (redoblante) rolls eighths with the offbeats pushed. The quinto (conga-hi) chatters across the bar line, the tumbadora (conga-lo) pushes the and-of-4. The bombo (kick) is the signature: silent through the 2-side, then two blows on the 3-side — the and-of-2 and a heavy hit on 4, the ponche the whole parade stomps on.
Listen for that accented bombo on beat 4 of the second bar; everything else is building toward it.
Practice: march in half notes and stamp with the bombo; Pello el Afrokán's mozambique grew out of this.