Simple Present Tense is used to talk about regular activities, routine work and our habits. Also it can be used to express our Feeling, Opinions & Truth.
Examples 1:
1. He watches T.V
2. She plays Tennis
3. We go to school everyday
Examples 2:
1. I live in Sri Lanka (truth)
2. They are angry (feeling)
3. English is easy (opinion)
4. The sun sets in the west (truth)