[Daljeet]

Twitter CEO Dick Costolo was facing the heat for some time. After Twitter went public in 2013, there was a lot of pressure on him to turn the service into something that could rival Facebook in terms of business potential and revenue. But quarter after quarter, Twitter's results disappointed investors.

1 Weak growth in numbers
2 No clear message to users
3 No clear business model
4 Cloudy future
5 Missed opportunities