So this one time my maths teacher at university told us that 1+1>2 when it comes to group studies. What he meant was that group studies are quite necessary in university life as you can learn and understand better from your friends. You need group studies at crucial moments, like finals week.
Therefore, it is suggested that you form a group with your close buddies so you can study together. It's important to form such clans as you'll be in sync with each other and understand the methodology of everyone in a group, thus ensuring the most effective outcome.