Yahoo announced it will offer a do-not-track feature starting this summer. The company says a simple-to-use button will tell advertisers to stop tracking your online activities.
It's a strong signal, but there is no law saying companies must honor that request. Just this week, the Federal Trade Commission urged companies to offer consumers a way to block online spying.
A do-not-track feature is already offered on new versions of Internet Explorer, Mozilla's Firefox, and Apple's Safari.