#3: Yahoo, 66.1 million+ mobile visitors per month
You might think Yahoo! (NASDAQ:YHOO) is a stodgy old dot-com company that hasn’t adapted to the new media landscape, but it’s worth noting the firm has made big inroads into mobile. I’m not talking just surfing — about 75% of mobile Yahoo! traffic comes from apps that include Yahoo! Weather and, of course, Yahoo! Stocks for the iPhone. The trouble is that ad impressions are much harder to come by when you get quotes or forecasts from your mobile phone instead of Yahoo.com … and that obviously is weighing on earnings. But the reach of Yahoo! is noteworthy.