IELTS measures the language proficiency of People who want to study or work where English is used as a medium of communication. It uses a nine-band scale to clearly identify levels of proficiency from non-users (Band score 1) to Expert (Band score 9).
More than 9000 organisations worldwide accept IELTS, including government bodies, employers and academic institutions. In fact, IELTS is the only English language test accepted for immigration purposes by countries that require one.