IELTS consists of 4 sections: Listening, Reading, Writing, and Speaking. All scores range from a band 1 to a band 9, with a threshold for being accepted into a majority of universities abroad being 6.5 for the average. Most universities however will only accept this score if there are no individual scores that drop below a band of 6.0.

From a mock test, you should be able to figure which few out of the 4 you are good at and which you need improvement. For the majority, their weaknesses lie in the writing and speaking parts, however each person has different weaknesses, so I suggest focusing your studies on 2 sections you believe you struggle at the most.