What is IELTS exam? Is it important to improve your english ability?

What is ielts exam? Is it important to improve your english ability? How can we get maximum point?

IELTS is stand for International English Language Testing System. It’s an English proficiency test like TOEFL but developed from UK and Australia. Maximum band is 9. they test 4 skills; listening, reading, writing and speaking and give you the band of each skill as well as the overall band so you will know what is your weak point.