"把(bǎ)" structure and "被(bèi)" structure are both very significant structures in Chinese.They represent to "active voice" and "passive voice" in English."把" structure is basically formed by the following parts:subject(A)+把+object(B)+action.It means "A does .... to B".The structure emphasize on consequence or method of an action.In modern Chinese,object is usually placed behind verb,and the usage of "把" structure can shift the object in front of verb,therefore can emphasize the result to the object caused by the verb.E.g.,我把苹果吃了(wǒ bǎ píng guǒ chī le,I ate the apple.).It implies that what has been eaten is an apple.The usage of "把" structure has three necessary requirements below:First,the verb must be transitive;Second,there is usually an additional part in front of or after the verb that states the consequence or method of the verb;Third,the object of "把" is usually certain,which means the speaker need to have a certain object to point at.This structure is quite commonly used in imperative sentences,such as the example you gave.
Another structure "被" is also very important as "passive voice",but I'll just leave it alone here for now.
As for that "来(lái)",it is a very special usage of this character.It is used as a directional complement that states the trend of a verb or a verb phrase.The whole sentence is still completely correct without "来",but using this character can make the sentence sound more natural and fluent.It is very difficult for beginners to understand the usage of "来" here,so you can just ignore it for now.