IELTS stands for International English Language Testing System, which is a standardized test used to evaluate the English language proficiency of non-native English speakers. The test is designed to measure an individual's ability to understand and use English in an academic and general setting.

IELTS is accepted by over 10,000 universities, institutions, and employers in more than 140 countries worldwide, making it one of the most widely accepted English language proficiency tests. It is jointly administered by the British Council, IDP Education, and Cambridge Assessment English.

The test is divided into four sections: reading, listening, speaking, and writing. The reading and writing sections evaluate the ability to understand and communicate in written English, while the listening and speaking sections evaluate the ability to understand and communicate in spoken English.

IELTS scores range from 0 to 9, with a score of 6.5 or above typically required for admission to universities in English-speaking countries. However, the score requirement varies by institution and program.

IELTS is designed to assess the language skills required for academic studies as well as daily life in an English-speaking country, making it an important tool for non-native English speakers who wish to pursue higher education, immigration, or professional opportunities in English-speaking countries.