When people saw the IBM Simon--the first smartphone ever, a big black and yellow brick--they would have never imagined that it would be the future. After all, all it had was a calculator, a fax, an email, and a couple of games.

Now smartphones can do virtually anything.

Mobile advertising, spurred by the growth in our favorite hand-held devices, has grown tremendously in recent years. In fact, it's going to account for 70% of all US digital ad spending by 2018.

What are you doing to make your brand go places?

Here are some quick facts to help you understand the mobile advertising landscape.

If you are looking at a more in-depth dive on how to win at mobile advertising, take a look at this free guide.