SURFING THE WEB

A new analysis of online consumer data shows that large Web companies are learning more about people than ever from what they search for and do on the Internet, gathering clues about the tastes and preferences of a typical user several hundred times a month.

These companies use that information to predict what content and advertisements people most likely want to see. They can charge steep prices for carefully tailored ads because of their high response rates.

Privacy advocates have previously sounded alarms about the practices of Internet companies and provided vague estimates about the volume of data they collect.

The Web companies are, in effect, taking the trail of crumbs people leave behind as they move around the Internet, and then analyzing them to anticipate people’s next steps. So anybody who searches for information on such disparate topics as iron supplements, airlines, hotels and soft drinks may see ads for those products and services later on.

Consumers have not complained to any great extent about data collection online. But privacy experts say that is because the collection is invisible to them. Unlike Facebook’s Beacon program, which stirred controversy last year when it broadcast its members’ purchases to their online friends, most companies do not flash a notice on the screen when they collect data about visitors to their sites.

When you start to get into the details, it’s scarier than you might suspect -- You're recording preferences, hopes, worries and fears.

But executives from the largest Web companies say that privacy fears are misplaced, and that they have policies in place to protect consumers’ names and other personal information from advertisers. Moreover, they say, the data is a boon to consumers, because it makes the ads they see more relevant.

These companies often connect consumer data to unique codes identifying their computers, rather than their names.

During the Internet’s short life, most people have used a yardstick from traditional media to measure success: audience size. Like magazines and newspapers, Web sites are most often ranked based on how many people visit them and how long they are there.

But on the Internet, advertisers are increasingly choosing where to place their ads based on how much sites know about Web surfers.

Web companies once could monitor the actions of consumers only on their own sites. But over the last couple of years, the Internet giants have spread their reach by acting as intermediaries that place ads on thousands of Web sites, and now can follow people’s activities on far more sites.
Large Web companies like Microsoft and Yahoo have also acquired a number of companies in the last year that have rich consumer data.

Web companies also can collect more data as people spend more time online. The number of searches that American Web users enter each month has nearly doubled since summer of 2006, to 14.6 billion searches in January.
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