ELIZABETH, NJ - More than 173 million people use Snapchat daily. Yes, daily.

Snapchat, per searchmobilecomputing.com, is is a mobile app that allows users to send and receive "self-destructing" photos and videos. Photos and videos taken with the app are called snaps. The app allows the sender to draw or insert text on the snap and determine how many seconds -- from one to 10 -- the recipient can view it before the file disappears from the recipient's device. Messages can only be viewed once, and during the viewing period, the recipient must maintain contact with the device's touchscreen or the snap disappears.

Snapchat can be fun when used with caution, according to experts, but it’s important to understand the app’s privacy settings, such as “ghost mode,” which allows the user to turn off the ability for others see their location, or 'snap map', which allows users' friends -- and potentially others -- to see their exact location.

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The Union County Sheriff’s Department has created a video to show Snapchat users how to set their privacy settings for safety reasons. 

“Technology moves at such a fast rate we need to keep up with our children’s safety,” said Union County Sheriff Joseph Cryan. “If you have a teenager with Snapchat, please view this important short video.”

Snapchat users -- and their parents of users -- should never assume that what's posted on Snapchat is private. safe. Experts also argue that people often accept friend requests from others they don’t know, making  it easier for criminals to use social media to their advantage.