English is a universal language. We can find English speaking people in nearly every country of this world. It is easy to learn as a second language too. Though there are some drawbacks, like silent letters and pronounciation, for new learners, but it is still easier than other languages. Moreover, it belongs to the Indo-European language family, it means that English speakers need not make much effort in learning most of the other languages of the world, because most languages of the world belong to this family and are related.
English has an excellent literature. Not only native speakers, but non-native speakers too write in English language. Most of the programming languages are easier if we have knowledge of English. Things like emails and websites also have their addresses in English alphabets. Now-a-days, English is "lingua franca", it means that most successful leaders of the worlds belong to English speaking community, most people want to learn English and English is the most widely used language.