To make a Web URL address show up as a link when you edit your profile use the following :
<a href="web address between the quotes">type the text you want to show in the link here</a>
1) so what you need to memorize is
<a href=""></a>
2) make sure there is a space between the A and the href.
3) put the name address of the website between the quotes
4)Put the text you want in the link before </a>