Expresses that someone does something for the speaker (or another person in speaker's group); 'to do something for me/us'.
Long explanation:
The て くれる grammar point is used to express when someone does something for, or gives something to the speaker (or someone in the speaker's group). The action is usually done willingly or as a favor by the person performing the action. It is usually translated into English as 'to do something for me' or 'to give something to me'.