Why people prefer fast food? Firstly, it is a good opportunity to have a snack, if you have no time. This food is cooked quickly and you needn't to wait for a long time and be hungry. Secondly, fast food isn't expensive and you can buy it everywhere. If you want to eat, you do not have to pay a lot. Thirdly, fast food is tasty and nutritious.
But some people don't eat a fast food. They think that it is unhealthy food and harmful to health.