New Google tool to track money

Google already monitors online shopping – and now it’s keeping an eye on physical stores to try to sell more digital advertising.

The internet company said Tuesday that a new tool will track how much money people spend in merchants’ brick-and-mortar stores after clicking on their digital ads.

The analysis will be done by matching the combined ad clicks of people who are logged into Google services with their collective purchases on credit and debit cards. Google says it won’t be able to examine the specific items purchased or how much a specific individual spent.

But even aggregated data can sometimes be converted back to data that can identify individuals, said Larry Ponemon, chairman of the Ponemon Institute privacy research firm.

Mining Credit Card Data

Google says it has access to roughly 70 percent of U.S. credit and debit card sales through partnerships with other companies that track that data. By matching ad clicks with this data, Google says it can automatically inform merchants when their digital ads translate into sales at a brick-and-mortar store. Previously, if people clicked on an ad without buying anything online, an advertiser might conclude that the ad was a waste of money.

If the program works, it could help persuade merchants to boost their digital marketing budgets.