The verbs 去 and 来 show movement in relation to the speaker.
去 — movement away from the speaker.
来 — movement towards the speaker.
After motion verbs, usually a place is stated without the preposition 在 .
The part of a sentence when there is a place word after the motion verbs is called circumstances of place.
Scheme
who
来/去
place
where?
Examples
她去商店
She went to the store
tā qù shāngdiàn
她来商店
She came to the store
tā lái shāngdiàn
There are cases when we don't specify the place itself as the circumstance of place, but instead we indicate the person to whom the movement is directed. For example: “come to my place”, “go to my grandmother's”.
In sentences with 来, you have to put the demonstrative pronoun 这儿 or 这里 after the person. And in sentences with 去, you have to put the demonstrative pronoun 那儿 or 那里 after the person.