Banners, logos, icons and ... favicons!
For example, you may or may not know about favicons - these are the tiny little logos that appear next to web addresses in your Favourites menu. I can design and make one for you - and also tell you how to get it to appear properly. Hopefully you can see Toad's effort in your browser's address bar - a letter "T".
Banners, logos and icons can be animated too (Toad would need to change them into GIFs, if they are not already in that format). Please note that if they are to work properly on a website the original values of the width and height must be retained - you cannot re-dimension the size of the image on the page. The animated GIF shown here is based on one of the images produced by Eduardo Di Lascio.