The online marketing services support industry contains a vast array of players, but Borrell Associates, in an October 2012 report has generalized them down to a more accessible list, and has estimated that 51.7% of North American small and medium size business (SMB) online marketing service dollars are spent on the web presence category. This represents $202 billion in spending in 2012, and includes such services as website design and management, hosting, and social media management.
All other online marketing services hover around 12% share of the $390.5 billion market. Online ad production takes 12.9% of the dollars, with online agency and exchange fees representing about half that spend. Read the rest at MarketingCharts.