International English Language Testing System, simply known as IELTS is the most popular and widely accepted English language testing system. It is established in 1989 and managed by British Council, IDP: IELTS Australia, and Cambridge Assessment English. Today IELTS has become mandatory for students who want to go for higher education in countries like Australia, the UK, the USA, Canada, and it is also required for migration. Now it is recognized by more than 10,000 educational institutions, many organizations, and immigration authorities in more than 140 countries. More than 3 million peoples have taken the International English Language Testing System (IELTS) examination last year, from this we can easily understand the importance of IELTS for international higher education and migration purposes.