Summary: As a September 2011 eMarketer study revealed, online ad spend will top more than $31 billion by the end of 2011. Over the next three years, eMarketer estimates that number will increase to nearly $50 billion.
Summary: As a September 2011 eMarketer study revealed, online ad spend will top more than $31 billion by the end of 2011. Over the next three years, eMarketer estimates that number will increase to nearly $50 billion.