Firstly and most importantly, To save your mental health! You work 5 days a week in this workplace and for sure not everyone will be nice to you and not every one will treat you fairly and not overwork you! Therefore you will need to express what you truly want to say and disagree whenever you need to! Secondly, By working through conflict in the workplace, you’ll feel closer to the people around you and gain a better understanding of what matters to them and how they prefer to work. You’ll also set your own boundaries on how they should be treating you.