It's been a tough year for Twitter (NYSE:TWTR) so far, with shares down close to 40%; but there are reasons for investors to be optimistic about the long-term picture for the stock.

With the World Cup about halfway over, Twitter has already proved to be one of the premier platforms on which the world is communicating about the beautiful game and their favorite teams. But management isn't resting on its laurels, either. It looks like Twitter is testing a "Retweet with comment" button in certain markets, aiming to bring more conversation into the mix, and boost engagement. And there's also word that the company is testing out a WhatsApp share button in its mobile app for Android devices, mostly in the Indian market.

In the following video, Motley Fool analyst Jason Moser explains why he thinks the future looks bright for Twitter, and why investors will want to take note.