Facebook introduced the check in feature way back in 2010, but the location sharing feature has remained popular since then. In fact, it's become a great tool for businesses to advertise organically.

So, what is checking in on Facebook? Really nothing more than the modern equivalent of scrawling "Your Name was here," except rather than leaving behind graffiti, you post the information on the world ...

As a business owner, you can use the Facebook Places application to connect with new and existing customers online. Customers who are active on Facebook can use the "Check-In" option to share with ...