As we've mentioned in the past, the Site Exclusion tool provides you with more control for your campaigns that are targeting the Google Content Network by allowing you to exclude your ads from showing up on particular sites or sections of sites (such as the sports section of an online newspaper).

Today, we'd like to let you know about a recent change: you can now exclude an unlimited number of sites. We hope you'll use the Site Exclusion tool to improve your ROI and refine your targeting across the network. And, as always, we'd like to remind you that excluding a site (or a section of a site) from one of your campaigns will prevent your ad from showing on all of the pages of that site (or section). Therefore, to ensure you don't miss out on any potential customers, we suggest that you review a site carefully before deciding to exclude it from your campaign.