From UFStarfleet Wiki
Shuttlecraft, or shuttles, are auxiliary craft most typically attached to a starship or a starbase. Most shuttles are short-range starships, possessing only impulse drive or a limited warp capability. Utilization of shuttlecraft is common especially for situations where the transporter cannot be used for landings, or where such technology does not yet exist.
Shuttlecraft range in size from the larger, longer-range, and more versatile types, such as Runabouts, to the small, short-range types commonly known as shuttlepods.