When diagnosing an issue, you need to think back to what was the last item that changed. It could be a code push that somehow removed analytics from your site, it could have been a change to content that has caused a decline in search traffic. Did you make a change to your advertising? Sudden declines (or increases) are often traceable back to the last modification (big or small) that was made. - Greg Kihlstrom, Yes& Agency
Display traffic is traffic to your site from ads or banners on other sites. For example, you might pay for placement of a banner on a related site, or run an affiliate program where the ads link back to your site. Display traffic contrasts with organic traffic, which comes from search engines, and paid traffic, which comes from programs like AdWords. If you want to attract display traffic, consider hiring a graphic design expert to create attractive, click-worthy banners.
Websites produce traffic rankings and statistics based on those people who access the sites while using their toolbars and other means of online measurements. The difficulty with this is that it does not look at the complete traffic picture for a site. Large sites usually hire the services of companies such as the Nielsen NetRatings or Quantcast, but their reports are available only by subscription.