Twitter (NYSE:TWTR) made its debut on the stock market today to much fanfare, and shares are already up big. Motley Fool analyst Taylor Muckerman isn't surprised by the news. What he is surprised by is just how much this IPO reminds him of Facebook's (NASDAQ:FB), and he's afraid that Twitter will see the same results, especially considering that their business models are very similar. Twitter made over $1 billion in revenue thanks to advertising, but Taylor's not sure how the company will increase that -- all the changes he's seen from the company have been display-centric, and not focused on revenue. This is definitely one debut that investors should keep watching.

Fool contributor Mark Reeth has no position in any stocks mentioned. Taylor Muckerman has no position in any stocks mentioned. The Motley Fool recommends Apple and Facebook. The Motley Fool owns shares of Apple and Facebook. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.