If they choose to be visible, they'll appear as an "Actionmoji" on their friends' new Snapchat maps.
It shows where you are on a map to anyone who is on your friends list and posts can possibly be seen publicly depending on your settings.
Snapchat introduced a new feature called "Snap Map".
Even Stories from non-friends can be viewed because Snapchat will make some available through the public "Our Story" option.
But a Snapchat spokesperson told The Sun Online: "The safety of our community is very important to us and we want to make sure that all Snapchatters, parents and educators have accurate information about how the Snap Map works".
"Humans can't keep up at the rate [technology] is progressing, so the most important is talking to your children; 'here's why this isn't safe, ' and give specific use cases", she said.More news: Americans Are Getting Tired of Michael Bay's Transformers Films
The update has led to concerns from safety experts who fear it could be used to stalk or bully others.
"Right now, it's in your face".
The feature "connects with Global Positioning System and automatically (unless activated ghost mode) shows where you are on a map to anyone who is on your friends list and posts can possibly seen publically depending on your settings!" The social network's mobile app will show you the precise neighborhood your Facebook friends are located in when nearby as well as display the location of friends who are now traveling.
"But I think overall, if you're aware of what's going on with your child you're going to know who they're snapchatting", Schneider-Loberg said.
The spokesperson added: "It's also not possible to share your location with someone who isn't already your friend on Snapchat, and the majority of interactions on Snapchat take place between close friends".