That very much depends on the program that you are aiming for.
Excellent letters of recommendation (2 are good, 3 are better).
Good GPA (Varies from college to college). Contact UoM to find out what's the cut-off for your desired program.
Well-penned Letter of Intent. It is crucial to justify to them and yourself why you need to be pursuing this course.
Try to score upwards of 7.5/9.0 in IELTS if you're not a native English speaker. The University has specific cut-off scores for each category (i.e., listening, writing, speaking and reading).
All the best.