A new research from Pew Internet & American Life Project found using a search engine is the number 2 activity for Internet users nowadays.
According to the Pew Internet & American Life Project, the number of U.S. Web users taking advantage of search engines has risen sharply since mid-2004--from 30 percent of the U.S. Web population in July 2004 to its current level of 41 percent, which translates to some 59 million Americans.
The Pew project also found that those likely to spend more time on search engines tend to be in their 30s and well-off.
More info over here. The number one activity on the Internet is still e-mail as about 52 percent of all U.S. Internet users are pressing the Send button on an average day.