In today’s wireless world, mobile advertising is now essential to the foundation of any successful marketing campaign due to it having one of the fastest growing audiences. Believe it or not, but cell phone usage has grown more prevalent over the last year. Nearly "half of all adults go online using a Wi-Fi connection or broadband card, while 40% of adults use the internet, email or instant message from mobile phones", according to PEW Research Center's Mobile Access 2010 study released last month. With mobile advertising, you can target your audience with location-based services and send them highly relevant mobile messaging when they are most influential. Your brand is literally in their hand.