IELTS is the world's most popular English proficiency test for study, work, and immigration. It assesses all four language skills - listening, reading, writing, and speaking. Over 3 million tests are taken annually in over 140 countries. Test results are accepted by over 10,000 organizations worldwide, including educational institutions, employers, professional bodies, and governments. IELTS is taken on either paper or computer and tests a variety of language skills, including reading for detail, meaning, and arguments. It is widely accepted for study at universities and immigration to countries like Australia, Canada, the UK, and others.