Twitter stock 2015

Twitter Inc. (NYSE: TWTR) stock closed up more than 10% over the past week, following news that the social media company is more than doubling its advertising efforts in Europe.

TWTR has had a wild first year of trading, but today, shares are still up nearly 100% from their offer price.

Here are the most important figures Twitter needs to execute on for the remainder of the year if the stock is going to keep climbing into 2015…