IELTS is the world's most popular high-stakes English language test. It assesses the language proficiency of people who want to study or work where English is used as a language of communication. The test evaluates reading, writing, listening and speaking abilities. There are two versions of the test - Academic and General Training. Various books and online resources are available for test preparation, and top coaching centers in Delhi provide classes, materials and practice tests. Regular courses help improve all skills needed to achieve the required IELTS band score.