This is the 6590th most frequent Russian word.
go
The Russian word "go" does not exist; perhaps you mean "иди," which translates to "go" or "walk" in English.
Here, 'иду' means 'am going', indicating the action of moving towards a destination in progress.
Я иду в магазин.
I am going to the store.
In this sentence, 'идёт' is present tense, third person singular, expressing a habitual daily action of movement.
Каждое утро он идёт в школу.
Every morning, he goes to school.
Here, 'шли' is in past tense, first person plural, describing an action of walking in a completed past scenario.