Check out this alarming news report about how easy it is for someone to find out where you or your child lives, attends school, daycare, etc.
Click here to get instructions on how to turn off the geotagging setting on different smartphone models. It's a pretty simple process. This site has more detailed instructions if you are having problems.
I am a little appalled that the factory setting for this isn't to have it turned off, since most people are not aware of what is being shared in metadata. Please pass along this information to other parents.