The larger the file size of an ad, the longer it takes to display the ad. Slower ads have lower click-thru rates. To estimate the download time for ad, consider that a 28.8Kbps modem can transfer about 3K bytes per second. Restrictions Publishers can restrict the ads shown on their page by the file size of an ad, the quality of the ad's presentation, and how benign the content of the ad is. Use of the rating systems is voluntary.
Publishers can also restrict ads by domain name.
This allows publishers to immediately ban any ads that are inappropriate for display on their site. Animation Ads may be animated or not. Animated ads, although larger in file size, tend to have a higher click-thru ratio. Additionally, some sites may not allow animated ads. Therefore, we recommend advertisers make both animated and non-animated versions of their ads.