10 Years On, What Is the Point of Twitter?

On Twitterâ??s 10th birthday, then, any celebrations at the companyâ??s San Francisco headquarters will be tempered by the knowledge that it faces serious challenges over expanding its user base and monetising its activity. It also faces a deeper, existential question: what is the point of Twitter? Should it be useful or fun? Serious or silly? Should it aspire to world domination or be content to become an elite preoccupation, such as opera or HBO?