The new ComScore metrics for the month show Facebook had 12.5 billion ad views during the month, a 21.6 per cent market share.
Microsoft sites ranked second with 3.8 billion ad views (a 6.5 per cent share), while eBay came third with 2.9 billion ad views (4.9 per cent).
Mobile phone operators took the top two slots in the largest advertiser category, with O2 taking 1.9 per cent of the total market, and T-Mobile taking 1.3 per cent.
Top 10 online display publishers, April 2009
|Property||Total Display|| |
Share of Display
Top 10 UK online display advertisers, April 2009
|Property||Total Display||Share of |
Publisher ad views
|Royal Mail Group||575,444||1.00%||12,190|