Apple's operating system could change the equation for consumers and competitors.

Apps let companies mine far more of your personal data than websites.

Facebook's new advertising tool Atlas helps companies improve their targeting.

We're watching the Fed, mobile ad spending and vaccination rates Wednesday.

Even if you don't follow someone, you might start seeing his or her tweets.

Facebook’s strong second-quarter earnings were propelled by mobile-ad revenue.

Mobile phone ads work best for practical items like cars and refrigerators.

The company looks a lot better to investors than it did a year ago