It's not ideal to have a raw concrete floor in your garage, especially given how it's usually used. While it is true that it is a very durable material, this does not necessarily imply that it is the best for your garage floor.
Your floor is vulnerable to damage from your automobile, lawn or gardening equipment, collisions, road salt, and other factors since it is uncovered. If you're not careful, your floor may end up chipped or broken. Concrete is also a porous material, allowing moisture to penetrate and cause cracks over time.