If left unattended after use, a garden hose will have to withstand UV rays that interact with its material and make it brittle or cause cracks. A hose reel will keep it safely coiled and increase its life and performance.
A garden hose carries water, which corrodes the inner metal mesh lining. This weakens the structure and if it is not preserved in a reel, it will start leaking.
You can move the hose effortlessly in a hose cart rather than carrying the bulky coil manually.
An unattended garden hose can come in your toddler's or pet's way and cause accidental falls.
If it is left lying on a driveway, vehicular pressure will damage the hose.
Your garden will look a lot neater and tidy with the hose tucked away in a reel.