The simple present tense is one of several forms of present tense in English. It is used to describe
habits, unchanging situations, general truths, and fixed arrangements.
THE SIMPLE PRESENT TENSE IS USED:
To express habits, general truths, repeated actions or unchanging situations, emotions and wishes
I smoke (habit); I work in London (unchanging situation);
To give instructions or directions:
You walk for two hundred meters, then you turn left.