IELTS stands for International English Language Testing System. It is a standardized test designed to measure the language proficiency of non-native English speakers. The test assesses the ability to communicate effectively in English in four language skills: listening, reading, writing, and speaking. The test is widely accepted by universities, immigration authorities, and employers around the world.

The IELTS is available in two formats: Academic and General Training. The Academic format is designed for students who wish to study at the undergraduate or postgraduate level in an English-speaking country, while the General Training format is designed for those who wish to work or immigrate to an English-speaking country.

The IELTS test is administered at centers around the world and takes about 2 hours and 45 minutes to complete. The score range for the test is 0 to 9, with 9 being the highest score. Most universities and employers require a score of 6.5 or higher for admission or employment.

Preparing for the IELTS typically involves studying English grammar, vocabulary, and reading and listening comprehension. Many test-takers also work on developing their speaking and writing skills through practice and feedback. There are many resources available to help students prepare for the IELTS, including practice tests, study guides, and online courses.