Hi Deepak,

IELTS is an English proficiency exam to prove your proficiency in the language of Instruction.  The exam is scored on a 9 band system and universities have their own requirement for their programs.

Please visit the link to know more about the exam.

https://studyabroad.careers360.com/ielts-test

To know more about the test, check out a few sample papers here, https://studyabroad.careers360.com/ielts-sample-paper

All the best!

Do revert if you want more information.