IELTS is short of International English Language Testing System. IELTS is the world’s most popular English test, developed and owned by British council, IDP:IELTS Australia and Cambridge English Language Assessment. IELTS is conducted at over 1100 location across the world and is accepted worldwide as valid English Language test during academic admissions and employment for non native English speakers.
There are two types of the IELTS: the Academic Test and the General Training test:
IELTS Academic test is for those who would want to enroll in universities and other institutions of higher education in natively english speaking countries like The US, The UK, Canada, Australia & New Zealand. Also professionals such as doctors and nurses, who want to study and/or practise their profession in an English-speaking country, can take IELTS academic as English Language test.
IELTS General Training Test is for those planning to undertake non-academic training or to gain work experience, or for immigration purposes.
A separate test is also offered by the IELTS test partners, called IELTS Life Skills, that is used for UK visas and Immigrations. Also this test is an integral requirement for Visa processes in Australia & New Zealand. Also Canadian Immigration Authority accepts IELTS scores.