Finding the return on investment from Facebook ads is a continuing source of concern for advertisers that are looking for answers on what they get in return for spending millions of dollars to advertise on the site. It has become clear through General Motors' decision to pull ad funds that the industry must stop inventing new metrics and turn toward traditional tools.

Twitter has joined the growing roster of Web companies that have promised to honor users' browser-based do-not-track requests. The service will refrain from collecting data about users who have activated do-not-track when they visit outside sites with "tweet" buttons.

Google has developed the next generation of DoubleClick Search, allowing users to optimize ads on platforms across AdWords and adCenter supporting campaigns across Google, Bing and Yahoo.

Social News Network Comunitee named Brett Petersel its chief marketing officer.

The Weather Channel debuted a new version of its free app for iPhone and iPod touch devices.

The women's lifestyle Web video firm Deca is building out a video hub aimed at moms while extending its syndication business.

About one in five mobile consumers pursued some type of m-commerce activity, like comparing prices or buying digital content, based on a mobile ad they saw, according to a new study commissioned by the Interactive Advertising Bureau.

Through March of this year, an average of 80% of abandonment occurred within the first half of the ads, according to new research from Vindico. Full-episode players -- i.e., sites that run premium, full-episode content like Hulu -- and video portal sites showed the highest rate of first-half abandonment. Judging by ads that viewers actually complete, mid-roll is the way to go.

Facebook's app and Web site were used by nearly three-quarters of U.S. Android smartphone users in March, making it the most popular social-networking property on the Google platform. New data from NPD Group also finds that Facebook has maintained its dominance on Android over the last six months.

Cable TV giant Turner Broadcasting Wednesday struck a strategic partnership with Funny or Die that links the online comedy site's content with Turner's TBS and Adult Swim TV properties, along with select Turner digital outlets. Under terms of the deal, Turner will take a 10% stake in Funny or Die, and Turner Digital Sales will also handle all ad sales exclusively for Funny or Die.