Google maps moving marker on click

Question

What I want to do is,

on my map, when I click somewhere on the map, it shows a marker on the point, then I click different point on the map then it shows a another mark

Answer 1

Every time placemarker() is ran, it creates a new marker.

You need to create the marker once outside of the placemarker function and after that, inside placemarker, use marker.setPosition().