Who is visiting your Web site? What browsers do they use? Where do they go in the site? What pages do they look at? Your Web server log files contain the answers to these questions and more. Once you start using your server log information, you'll wonder how you ever got along without it.
Is a picture worth a thousand words? On a Web page, it can be worth substantially more in download time.
Few visitors are willing to stare at an empty screen for 10-20 seconds while your graphic image loads. They're far more likely to leave your site entirely.