GPS modules with Active Antenna and without Active Antenna
Generally, "support for active antenna" means that the receiver can supply DC power (typically 3.3V or 5.0V, current-limited to about 30 mA) up the antenna cable. With a highly-integrated module like this, that support is generally done on the PCB that it's mounted on, rather than inside the module itself.

While this module may work perfectly well with passive antennas (especially if the connection is short), active antennas will pretty much always give you a slightly better noise figure.