IELTS

Yes, IELTS exam is best in abroad study,

IELTS is best exam for abroad study.

For Masters program your IELTS score is ok as most of the countries asked for 6.5 IELTS for masters. if you just looking for visa chances then may be UK would be best because of their point based system otherwise you can apply for Europe or USA also. As per SAVIS report the number of students going to USA from India has grown by 31% this year in comparison to last and currently India stands on 2nd rank after China in terms of students going to USA from India. so you can apply for USA also as they are offering good OPT and CPT option at the moment to students which helps them in doing job with stay back option .

congratulation! for ielts. I am very impressive your ielts result. of course you go australia and make the better future and best scope of MBA in australia.

ToEFL and IELTS. is an exam to prove English language proficiency when you are going from non English speaking country to an English speaking country. ToEFL is an online exam. IELTS is you have write it in pencil. Both has four modules as Speaking Listening Writing and Reading papers.

For Masters, IELTS score of 6.5 and higher is required. You need to retake the test. Your academic grades will also be evaluated in addition to IELTS for admissions.

Chances are good enough basis your profile. You will also need a good SOP and LORs. Good Luck.

Dear Partap, you can give GRE, alongside you must give IELTS or TOEFL too. Check with the universities if they will accept three years bachelor degree as most universities in USA require a four years bachelor degree. Scholarships are awarded to meritorious students by the universities.I will advice you to first research on the universities.
Best Wishes

Shortlist the universities in which you are interested in and check the minimum requirements. Most of the universities require an overall minimum of 6.5 with no band less than 6. Still you can manage to get conditional admit with 5.5 score in few universities. But, it might create some problem during VISA.
I would suggest you to retake IELTS and apply later to the universities