Ratings can be customized for specific brands, ad categories, campaigns, or markets.</li> <li> <strong>DoubleVerify:</strong> provides online media verification and campaign effectiveness solutions for media entities looking to ensure quality advertising environments, campaign transparency and performance.</li> <li> <strong>comScore vCE (verification):</strong> is a holistic ad delivery validation solution that provides deep campaign insights including in-view data, geo validation, brand safe ad delivery and the prevention of non-human traffic.</li> <li> <strong>Integral Ad Science:</strong> provides verification services that scores and evaluates the brand safety, context, viewability and many other elements of web pages on an individual page level.</li> <li> <strong>