List of the major online ad analytics resources. The goal of Web ad analytics is to provide useful information for advertisers about the reach, frequency, arrangement intent and brand lift of their ads, helping them to make decisions about managing, designing and placing their ads. Most ad analytics programs aim to minimize the amount of waste and detect ads that are proving ineffective, while also analyzing the placement of advertisements around websites or ad networks and measuring the level of user engagement. This in turn helps the advertiser determine the effective rate of return on the ads, and decide whether or not it is profitable to continue funding the advertisement or campaign. Some of the listed ad analytics companies include Omniture, Caremetrics, Unica, Webtrends, Marketshare and Google Analytics.