InfoWorld reports about 80 percent of all visits to Google are for the main search site.
Google's image search engine draws 9.5 percent of the visits, followed by Gmail with 5.5 percent and Google News with 1.49 percent, according to a blog posting by Bill Tancer, Hitwise's general research manager.
All other Google sites, including the critically-acclaimed Google Maps and the comparison-shopping engine Froogle, receive less than 1 percent of visits, he wrote.
The situation is much different at Yahoo Inc. and Microsoft Corp.'s MSN, both of which are Web portals which in recent years have significantly invested on their search engines.
According to Tancer, Yahoo Search only gets 9.8 percent of Yahoo's visits. Yahoo Mail gets 33 percent, followed by the Yahoo homepage at 32 percent. At MSN, Hotmail gets 41 percent of the visits, followed by the MSN homepage at 33 percent and MSN Search with 16 percent.