The quality of the graphic images you use really does reflect on your company’s standards. One of the worst offenders is the JPEG logo or banner which has been allowed to ‘break down’ by poor or repeated resizing. You’ve probably seen what I mean:
Amazingly, some companies have awful graphics like this on their websites, but it’s also common for them to be found in promotional banners included in the footers of emails. Don’t let it be you. JPEG is a perfectly fine format for photographs, but for logos and text, get the original perfect vector source, if you can, and only save it in GIF or PNG format. Nowadays, images get resized at the user end in ways you can’t imagine. Some viewers will have amazingly high resolution screens, perhaps much better than yours. So give your business the best chance of looking good.