eMarketer expects that, worldwide, growth in social network advertising will be 9 percent in 2009, reaching $2.2 billion. This is down from eMarketer’s March 2009 forecast of 17 percent growth for the year.

eMarketer expects worldwide social network ad spending to grow substantially in 2010 though. The firm expects growth to be 18 percent in 2010, resulting in advertisers spending $2.6 billion on social networks across the globe.

In 2011, the growth rate is expected to be 12 percent, amounting to a total spend of $2.9 billion.

Senior analyst at eMarketer, Debra Aho Williamson , said changes in the U.S. market prompted the revision.

While non-U.S. social network advertising expenditure is forecast to grow by 27 percent this year, eMarketer expects the much larger amount of money poured into U.S. social networks to decline by 3 percent this year.

Source: Debra Aho Williamson, “Worldwide Social Network Spending Climbs…Less Quickly,” eMarketer, July 14, 2009

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• U.S. Social Network Ad Spending To Fall in 2009

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