With the incredible proliferation of smart phones, Yelp has become even more powerful. Smart phones all have GPS technology built into them so the phone knows where it is. This enables its user to then find businesses close to them, read the reviews and make a buying decision.
For example, let's say you've got a hankering for Chinese food. Simply whip out that smart phone and let your Yelp app know about your whim. Yelp will find the Chinese eateries near you and show you what others have said about them.
The Yelp app, using a correct business listing created by the proprietor of any business, also can tell you if a place is open based on the correct data the business owner provides. This is one of many, many reasons to take control of your Yelp listing - you can post your businesses' hours, post specials and more.
You can find out more about Yelp and how to claim your business' listing on Yelp's FAQ page. Or just give me a shout - I'm a help with Yelp. And still a lousy poet.