Online marketers in North America spent $5.75 billion on search engine marketing of all types in 2005, compared with $4 billion the year before. And they’re expected to shell out $11.1 billion in 2010, according to a recent report commissioned by the Search Engine Marketing Professional Organization.
Where did the money go last year?
The lion’s share, $4.7 billion, went for paid search advertising, in which companies’ ads appear on results pages to match relevant search terms. Search optimization, which boosts a marketer’s search ranking by tweaking its Web pages, may have been the most popular SEM tactic
Network
