Why is it called MagSafe? I still get confused sometimes at the name MagSafe. Has it anything to do with the magnet in it? Why MagSafe? is it safer than other adapters?
The magnet can save your computer. 

Let's suppose it's on a table connected to AC. If someone pull the cable with his foot by just walking by, the MacBook won't fall on the floor, the magsafe will just pop.