The Acclamators are dropships for dropships, which is pretty impressive. LAAT's and Acclamator-class ships both perform this role in the prequels, on different scales.However, drop ships were used when the deployment was on a more relaxed schedule, and ships were used to take the MIs off the planet. The ship (maybe) and its pilot (definitely) were inspired by Starship Troopers, though the preferred method in the book for deploying the Mobile Infantry was literally to drop them from orbit. Think of the lunar lander as a kind of Drop Ship and you'll get the idea. Truth in Television, given the fact that the physical requirements of "getting from a planet to orbit and back" are far, far different than those of "getting from orbit around one planet to orbit around another". In a proper sci-fi setting, the size and configuration is limited only by the author's imagination. These include, but are not limited to: drop ship, assault shuttle, landing craft.
Drop ships can go by many different names. If the ship is armed and/or the troops involved happen to be reinforcements, it may be the vehicle of a Gunship Rescue. Some are effectively a Military Mashup Machine between a space shuttle and a transport helicopter, while others are full-sized landing craft that are substantially larger. A common vehicle in Military Science Fiction: A Drop Ship is a craft used to carry troops, vehicles and/or supplies from an orbiting ship to the surface of a planet or natural satellite and back, sometimes while under fire.