What are the main differences between an 18-55mm lens and an 18-135mm lens in terms of focal length and versatility?

The main difference between an 18-55mm lens and an 18-135mm lens is their focal length range. The 18-55mm lens has a shorter focal length range, making it better for wide-angle shots, while the 18-135mm lens has a longer focal length range, allowing for more versatility in capturing both wide-angle and telephoto shots.