To paraphrase a well-known saying: a picture is worth a thousand words of bandwidth on the web. Because it takes time for graphics to load you will want to keep graphic file sizes small, no more than 90k in most cases, so that it takes no more than 3 seconds to load on a slow browser. If you have graphics that are larger, consider putting a miniature of that graphic on your page and using that "thumbnail" as a link to the larger graphic. That way your audience can get an idea of what you offer when they see the small graphic and will click on it to see more, willing to wait for the larger file to load. For example, the thumbnail could be a gif version of the picture that is only 6K, which then links to the larger 45K or 90K jpg version of the picture.
When using a thumbnail keep these two suggestions in mind:
First, do not just link to the graphic file itself. Instead, create another web page with the graphic embedded. Click on each of the following two thumbnails to see the difference.
It is slightly more work, but the page for the graphic is a much more professional display.
Second, on the page with your large graphic be sure to include a link back to your original page with the thumbnail.
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