What is tense why it is used in our daily life

Tense is a method that we use in English to refer to time - past, present and future. Many languages use tenses to talk about time. A tense is a grammatical category that locates a situation in time, to indicate when the situation takes place. Thus, it is actually impossible to frame an idea into a sentence without using tense. Noticing your own practical life would enlighten you more on the same.