Why do people vote on referendum when they already elected politicians to represent them?

People vote on referendums to directly express their opinions on specific issues or policies, allowing for public input on matters that may not align with their elected representatives' views. Referendums can empower citizens to have a say on critical topics, such as constitutional changes or social issues, that require immediate attention or a clear mandate. Additionally, they provide a mechanism for political accountability, enabling voters to influence decisions that affect their lives directly.