KEY POINTS:
US internet advertising revenue dipped slightly in the second quarter from the previous three-month period.
According to a report yesterday by the Interactive Advertising Bureau and PricewaterhouseCoopers, online advertising revenue totalled US$5.7 billion ($9.1 billion) in the second quarter.
That marked a significant increase from US$5.1 billion in the same quarter in 2007.
But it fell from the US$5.8 billion reported for the first quarter of this year.
This is the market's second straight decline.
In the first quarter, ad revenue fell from the US$5.9 billion reported for the fourth quarter of 2007.
The two largest segments of the online advertising market - search and graphical "display" ads - logged growth in the second quarter.
Search advertising revenue rose 24 per cent from the previous year to US$2.5 billion, while display advertising revenue increased about 13 per cent to US$1.9 billion.
