Web ads for investment advice, credit assistance, loans and other financial services comprised 20 percent of the 97.1 billion online display ads served in March, according to Nielsen/NetRatings' AdRelevance, reports Media Post. That was also the figure for March 2004. The top destinations for the ads were sites devoted to email (up from last year), portals and search engines (down from last year), and general and national news sites (up from last year).