<a href" ***">~~~~</a> an anchor, just gives your link.
Target="_self" opens link in same window.
If youre linking to a site with a banner, would still use target="_blank" to open in a new window, always easier to get back home.
<img src="****"> just your image name
"alt" is the text you should see in a little box when you put your mouse over an image, it's hepful when pics don't show for some reason.
Check this link out, some useful info on there.
http://www.w3schools.com/html/default.asp