Why are multiple blades better than a single blade?

Why are multiple blades better than a single blade?

Danielle Malka (Shaving Expert ) gives expert video advice on: What is pre-shave oil?; Why do I need pre-shave oil?; What is shaving cream? and more...

It's a lot easier to use. It's going to give you a closer shave and you don't have to worry about cutting yourself. Also, you don't have to learn how to handle that razor, because a single-blade is quite a tricky blade to use.