Coalitions play a pivotal role in parliamentary systems by facilitating the formation of majority governments when no single party secures an outright win. They allow diverse political groups to collaborate, enabling the passage of legislation and policy initiatives. Additionally, coalitions help represent a broader range of interests, ensuring that minority voices are included in governance. However, maintaining unity within a coalition can be challenging, particularly if members have differing aspirations. Despite these challenges, coalitions are essential for political stability and effective governance in parliamentary contexts.