(You can choose any one from them according to your reason for taking IELTS.)

IELTS Academic:
If you have a dream to get higher education or professional registration in various foreign English speaking countries then you need to clear the IELTS Academic test. It contains the features of academic language. Also, it will help to evaluate that, are you ready to begin studying or training or not. The academic IELTS is accepted by so many famous institutions of the world for the higher education.
IELTS General:
Candidates who want to go to the English speaking countries for work experience or training programs, they need to clear the IELTS General Training test. Also it is required when any individual wants to migrate to Australia, New Zealand, Canada, and the UK. This test is taken to examine the candidate’s original survival skills in broad social and workplace contexts.
IELTS IDP :
IELTS is a test which is invented by the IDP and University of Cambridge all together. In some countries, IDP is taking up the responsibility to conduct this test. There are some countries where the British Council took up the charge to conduct this test. Also in some countries both the IDP and British Council are in charge of this exam. India is also one of these countries where IELTS is offered by both the IDP and British Council. Just because of this reason most of the people get confused that where to go. But here is a very interesting fact about IELTS, which is an answer to all your questions. The fact is that the IELTS exams are the same in all over the world, whether you are giving it in any State, any City or In any Country. Just like the location also it does not matter whether you are giving your exam through IDP or British Council. The pattern of exams, questions as well as marking Criteria of IELTS will be always same in both conditions. Here we found some students who say that the marking criteria of British Council IELTS is easier than the IDP IELTS, but it’s not true. Because both the examiners of BC and IDP get trained in the same manner. The marking criteria followed by the examiner are same for both the IDP and British Council. So simply, it does not matter whether you are choosing British Council or IDP for IELTS, you will get the same marks according to your preparation. So, prepare well by choosing a best IELTS center in your Nearby location and get success. Don’t waste your time in thinking about British Council or IDP. Just prepare well and get success.

Note:
Academic reading and writing modules are designed to assess the ability of studying or working through English at any graduate, postgraduate or professional level of any candidate. General training, reading and writing modules are not designed to test the full range of formal language skills needed for academic purposes, rather they emphasize basic living skills in a broad social and academic context. General Training is most suitable for candidates traveling in English-speaking countries, for immigration purposes like Australia, Canada and New Zealand, not to the degree level, but to undertake work experience or training programs. It is the sole responsibility of the candidate to inform the examination center about what he wants to do in the academic or general training module.