The World Speaks IELTS

IELTS is the International English Language Testing System. It measures ability to communicate in English across all four language skills – listening, reading, writing and speaking – for people who intend to study or work where English is the language of communication.
Since 1989, IELTS has been proven and trusted worldwide to provide a secure, global, authentic and customer-focused test which measures true to life ability to communicate in English. More than 6,000 education institutions, faculties, government agencies and professional organisations around the world recognise IELTS scores as a trusted and valid indicator of ability to communicate in English.
Over 1,000,000 people a year are now using IELTS to open doors throughout the English-speaking world and beyond. The test is taken every year across 120 countries, and is one of the fastest growing English language tests in the world, and sets the standard in integrity, research and innovation.

When the question is English language ability - IELTS is the answer