For the first three months of the year, Twitter has reported lower than expected revenue. As BBC reports, the revenues are $436 million, which is up 74%, but is below forecasts. Despite this, the monthly users have increased by 18% year-on-year, which helps the firm to remain confident in its "long-term opportunity".
As the source reports, Twitter also said it was buying marketing technology firm TellApart, and announced a deal with Google to improve its advertising performance measurement.