In April, Google's paid clicks increasedby 19.6% year on year, improving on a decline in its first-quarter performance. US paid clicks declined by 0.3% year on year in January and expanded by only 3.1% year on year in February, and by 2.7% year on year in March.
The comScore paid-click data only analyses Google's US search ad performance, whereas Google's international business now contributes the majority of the company's growth.
Meanwhile, according to reports, the paid clicks of Google rivals Yahoo and Microsoft declined in April. Yahoo was down 4.4% and Microsoft was down by 9% year on year.
However, AOL's strategy of refocusing itself as an advertising platform appears to be paying off.
Its April paid clicks were up 28.3% year on year, according to comScore.