When you put your mouse over this text, it will turn into a pointing finger and you will be able to click on it. When clicked, your browser will bring up the page that is refered to in the link. This tells the browser to center whatever is between the two tags. This can be a picture or text. This would center the picture left and right, but not up and down.
Face is touchy.
Any font you select must be on the users computer also, or it will default to a different font. I recommend leaving this be for a while. Then that is a full location. It is all confusing at first, but if you play with it a little at a time, You will eventually get the hang of it.