It’s not Uber, it’s not Lyft and it’s not to be confused with the 40 cuc/hr. tourist taxis that surround Parque Central. It’s Havana’s own shared taxi system.
It’s a cheap, quick way for Cubans to get where they need to go without waiting in line and fighting for a seat on a bus.
If you want to go to Miramar or Playa Santa Maria, no problem.
One of several “pit bosses” will direct you to a taxi that’s going your way. The catch is that you have to wait until the taxi is full before the driver will leave. This, of course, ensures the driver that it will be a profitable trip.
There are several collection points around the city where taxis come and go all day long.