Blocking online ads
In the U.S., about 16% of all web users are blocking ads. But since advertising pays for the cost of creating what you read and watch online, what happens if that number grows? CEO of MediaMath, a company that helps brands get ads on mobile devices and the software developer of ad blocker, "Purify Blocker" discuss is ad blocking good or bad? Tune into CNBC at 7pmET tonight. Check your local listings.