Using Snapchat to connect, users have 10 seconds to live video-chat with strangers.

What parents need to know Meet Me: Chat and Meet New People. Although not marketed as a dating app, Meet Me does have a "Match" feature whereby users can "secretly admire" others, and its large user base means fast-paced communication and guaranteed attention.

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What parents need to know Chatting, meeting and dating apps Monkey — Have Fun Chats.

If you remember Chatroulette, where users could be randomly matched with strangers for a video chat, this is the modern version.

Below, we've laid out some of the most popular types of apps and websites for teens: texting, microblogging, live-streaming, self-destructing/secret, and chatting/meeting/dating.

The more you know about each, the better you'll be able to communicate with your teen about safe choices. If teens are using them respectfully, appropriately, and with a little parental guidance, they're mostly fine.

Gone are the days of Facebook as a one-stop shop for all social-networking needs.

While it may seem more complicated to post photos on Instagram, share casual moments on Snapchat, text on Whats App, and check your Twitter feed throughout the day, tweens and teens love the variety.

You don't need to know the ins and outs of all the apps, sites, and terms that are "hot" right now (and frankly, if you did, they wouldn't be trendy anymore).

But knowing the basics — what they are, why they're popular, and what problems can crop up when they're not used responsibly — can make the difference between a positive and a negative experience for your kid.

It's fast and has no message limits, character limits, or fees if you only use the basic features.