Apsalar, maker of a mobile ad platform that lets you intelligently purchase highly profitable ads, announced today that it has raised $9 million in a second round of funding led by DCM.The company’s technology is powered by a network of more than 800 million anonymous mobile users, which gives its platform a wide variety of potentially profitable users to target with ads. By focusing on the users who matter the most, Apsalar’s platform could help stretch the performance of your advertising budget.Apsalar started out offering mobile analytics for marketers, and last year it stepped into ad retargeting with ApEngage. The company has since dropped the ApEngage name as its ad platform became a more essential part of its business.The company plans to use the funding to hire more employees, build up its technology platform, and grow its sales and marketing teams. (Basically, what every young company wants to do with their second round.)San Francisco-based Apsalar has raised around $15 million altogether. Correlation Ventures also participated in the round, along with existing investors Thomwest Ventures and DM Capital.