Res sub judice plays a crucial role in civil litigation by preventing parties from pursuing new legal actions related to an issue that is already under consideration by a court. This doctrine ensures that the same matter is not litigated repeatedly in different courts, promoting judicial efficiency and finality of decisions. It restricts the ability of parties to initiate parallel proceedings or file similar claims in separate jurisdictions, preventing conflicting rulings and unnecessary legal delays. In response, parties involved in civil litigation should adopt strategies that focus solely on the ongoing case, ensuring that all relevant issues are addressed within the current court's proceedings. Lawyers should monitor the progress of the case closely, file motions or appeals as necessary, and avoid any actions that could lead to the same issue being raised elsewhere. By adhering to res sub judice, parties can streamline their legal efforts, minimize risks of procedural errors, and avoid complications arising from multiple legal actions.