Let's say you want to put in a link that says, "Click here to go to Google."
Well, you have to enclose the word "here" within a "Hyperlink" tag. The form is:
<A HREF="http://www.whatever.com"> YOU NEED THE "http://" or it just won't work! And don't forget the whole address must be enclosed in double-quotes. The capital A says it's a Hyperlink tag (it can also be an "Anchor" tag; why it isn't just called an "Address tag" I can't tell you) and the HREF stands for Hypertext REFerence, which means, "what's next is an address."
That opening tag, enclosed in angle-brackets, is followed by the text you want people to see (the word "here" in the example)
followed by a closing tag: </A> (the slash says, "this closes the Anchor tag.")
So what you would actually type into the comment box would be:
Click <A HREF="http://www.google.com">here</A> to go to Google.
What people would see is:
Click here to go to Google.
(make sure you put a space after "Click" and before "to go" or it will read: Clickhereto go to Google.)
Sometimes you need to not have the www in the address. To make sure you get it right, you can go to the site you want to direct people to, like your own blog, and copy the full address from the address bar in your browser. Then back to the blog you are commenting on, and type in:
Click <A HREF="
then put your cursor immediately after the quotation mark, and paste the copied address.
">here</A> to go to Google.
Don't forget to include the quotation marks before and after the address.
You can do the same thing, only easier, to make words or phrases <b>bold</b> or <i>italicized</i>. None of these tags will show up after you submit your comment. It will just have bold or italicized words, or links.