click the name of the user when you see them post and copy the URL and paste it onto here
when you click onto the users name select "view public profile" now idk if you know how to copy and paste, but i will try and help
when you see the profile go to the very top of the page in the URL (thats the
http://www. area and select it and right click the area and go to "copy" then come back here (to the message: area) and right click and "paste" it
hope that helps