The url is at the top of your screen and starts with http://
This is the "address" of the page you want to send.
So if you want to send a page from here or from anywhere else, you right click your mouse with your cursor on the url. It will turn a color when you do that, (highlighted) and then click on copy.
Then go to where you want to place this for someone else to see. Like a reply, PM, email, etc...
When you get there, right click in the spot where you would normally type, and then click paste.
the whole url will appear.
Be sure you leave a space between the url and any other typing. :D:D:D