No Mobile Website? You're Probably Turning Customers AwayThree tips for making your website smartphone-friendly.

If you still don't have amobile-friendly version ofyour websiteyou're most likely turning away potential customers without knowing it.

Consider the numbers: Nearly half of all U.S. adults use asmartphone, according torecent findingsby the Pew Internet and American Life Project. Ninety percent of those smartphone owners say they use the device tocheck email and surf the web. That's not counting people who use other mobile devices, such as tablets, to access the web.

With mobile internet traffic on the rise, you might think small businesses are developing mobile-friendly websites. But you'd be wrong. Only 26 percent of small businesseshave a mobile website. That's a growing problem -- especially for local businesses.

Related:Three Steps to Creating a Killer Mobile Site

Take, for example, a recent excursion I had with a friend in New York City's Upper West Side. We were on the move, smartphones in hand, looking for a particular restaurant -- which will remain nameless -- to grab a bite to eat. I used my Motorola Droid Razr to look up the restaurant's website but all I saw was a white screen with two links to download PDF files of the lunch and dinner menus.

No contact information. No hours. No easy-to-read menu. Sorry, no business from me.

With more people using their mobile devices to access information about companies, business owners need to think about how their website displays on smartphones and tablets. If content isn't easy to read and access on a smaller screen, customers might go to the next shop down the block instead.

When developing a mobile-friendly website, or a dedicated mobile site, here are some important things to keep in mind:

1. Display your company's most important information at the top in plain text.This includes your name, address, contact information and perhaps a brief description of what you do.

2. Don't include Flash-based videos on your mobile site.Many devices don't support Flash. Plus, video eats up data and can take a long time to load.

3. Make information easy to read on a small screen.Don't complicate navigation across several pages, and don't make users download PDFs. The more straightforward, the better.

Related:5 Things to Consider Before Buying a Smartphone or Tablet for Business

What tips do you have for creating a mobile-friendly website?Share them in the comments below.