Why is fast food so popular?

This topic is very interesting because the fast food is dangerous for the body and the people do not understand this.

The fast food is popular because it is very cheap for example Taco bell. 

This place has year round combos or discounts and the target that visits Taco Bell is very young people students and these people love junk food.

Finally, it is popular because it is cheaper than other restaurants, for example “spoom”