Q. Kim, please explain the significance of the "Like" button on Facebook. What does is actually do and what benefit is it to us? Does clicking it cause our personal information to be transmitted, published or posted to places we may not want or approve? Is it mainly an advantage to advertisers?
-L.W. from Atlanta, GA, listens to my weekly radio program on WSB 750 AM.

A. Social media is still a confusing place for many people. Sites like Facebook and Twitter are adding features every day, and new networks pop up all the time. Keeping track of all of them is a hassle.

It's good that you are being cautious. Facebook's constant changes make it harder to protect your privacy. That's why I wrote my Guide to Facebook Privacy e-Guide. I recommend it to everyone who uses Facebook.

The "Like" button has especially evolved over the last couple of years. Instead of simply liking the pictures or posts of your friends, you can now like just about any piece of content. You can even like things that aren't on Facebook. But should you?