Android will likely see strong growth through 2013, which places a premium on SEO aimed at Google's algorithm.

Android will likely end 2011 as the most frequently used mobile operating system in the U.S. smartphones market, eMarketer said this week. SEO campaigns focusing on Google will likely become more valuable as Android devices – and mobile search – grow in popularity.

Brafton reported this week that Google is still the primary search engine, fielding nearly two-thirds of all queries. Additionally, Google is the leader of mobile search by a wide margin. The search giant accounts for more than 95 percent of the mobile search market, according to StatCounter data.

According to eMarketer, Android-powered handsets currently account for 37 percent of the smartphone market in the U.S. In terms of the most popular device, iPhone is currently in the lead. However, Android offers a series of phones from every major service provider, which eMarketer believes will propel it to consistently strong performances through 2013.

For marketers, the popularity of Android-powered smartphones is especially relevant given the popularity of Google as a mobile search platform. Brafton reported on Wednesday that 71 percent of Android users have used Google mobile search in the last 30 days, making it one of the most frequently used applications on the mobile operating system.

Joe Meloni is Brafton's former Executive News and Content Writer. He studied journalism at the University of Massachusetts, Amherst, and has written for a number of print and web-based publications.