How do you make a URL to your tree

Answer 1

There's a "Share" button at the bottom of the screen that will set whoever it is shared with to the currently selected person, and there's a dropdown menu for if you want the person getting the link to be able to edit the tree or not (its automatically set to "can edit").

You can either copy the link or use the little emailing tool provided-- make sure to read what permissions it's going to give the reciver! 

Answer 2

Go to any node other than your me node, select Invide [name] to share family, select the permsions you want that person to have, then select Create Link.

The link made is temprary and will expire.

If you're trying to make the tree freely visable to anyone, then you're better off downloading it as an HTML and sharing the file.