An example of this kind of editor is Microsoft Frontpage. I personally prefer writing in plain HTML because of the control it gives me over the layout of the page. Another good reason is for ease of maintenance. The approach you decide upon depends on whether you want to learn more and take the challenge, or learn less and take it easy. You have either downloaded an editor or learnt about how to write HTML yourself and now wish to know how to make use of images in your web page.
Images can be background or foreground images.
Everything else goes on top of the background images, whereas foreground images dont have anything over them. Background images also repeat automatically. GIF supports animation but only up to 256 colors, JPG supports up to 16.7 million colors but does not support animation. You can either create your own images or take images from other pages to add to your page. Not everyone, however, is a graphics guru and sometimes you want a nice looking image for your page that you just don't know how to make.