I saw "IELTS" word for several times in italki, but actually i'm still confused what is "IELTS" ? Could you explain about it to me? What is "IELTS" for?
It is International English Language Testing System
IELTS is an international English test that measures your basic skills, and the score given reflects how much you are qualified to travel to certain countries. Other countries need another English test, IBT which is required also to measure the basic skills. IBT is mostly more difficult than IELTS.