at LQ you have to write the world "Here" somewhere in your post, highlight (select) it then press the "Insert link" button (the one with a globe and two rings of a chain) and write the URL in the pop-up. You will end up with the following tags inserted in your text, around the world "Here":
Some text [URL="http://www.some.domain.org"]Here[/URL] Other text.
A similar procedure applies when you write an e-mail. For example in Thunderbird you can select some text and go to Insert --> Link...