Dropping draggable pin on the map using Google Map Api

Dropping draggable pin on the map using Google Map Api

I am making a project about creating venues. I can get the coordinates of
address in my project. According to that coordinates, a draggable pin
should drop on the map. I am using Google Map Api in my project. I dont
know how to write javascript codes. Is there any request link for getting
that pin in Google Map Api.