A simple Present or Present Indefinite Sentence refers to an act that begins and ends in the present only.

It describes as an activity that occurs and ends in the present time. The genuine events that happen.

In order to express the universal truth. The earth revolves around the sun.

Honesty is the best policy.

To express habitual actions He goes for a walk daily.

Dogs barks.

In exclamatory sentences. Here comes the truth!

There she goes!

To indicate the present time My father works in a factory.

Our School has a grand building.