It's official: Twitter is preparing to trade on the stock market.

Its entry into the public market will undoubtedly be the most talked-about IPO since its social brethren Facebook (NASDAQ:FB) began trading in May 2012.  The company announced it had filed the initial documents for review with the SEC -- appropriately, via tweet -- late Thursday:

Aside from that, there are few details as to what exactly to expect from the micro-blogging powerhouse, and we might not get more information for some time. Twitter elected to use a filing method for smaller companies under the JOBS act that could allow it to keep investors in the dark for the time being. Fool contributor Andrew Tonner reviews the few knowns for the big-ticket IPO in the video below.