A perfect domain for the teenage market, combined with the word "tag" which could signify hashtags (like on Twitter), personal identify (your "tag"), or exchange from one to another (to play "tag").
The word "teentag" contains seven letters and only two syllables. Two-syllable names are exceptionally rare and exceptionally desirable. Examples of two popular syllable names include Gucci, FedEx and Walgreens.
This domain was first registered in September 2004. Older domains have an advantage when ranking in search engines.
Teentag.com is a .com domain. Dot com domains are the most sought after domain extension in the world, famously used by websites like facebook.com. When most people think of a website, they think of a .com.