Political parties are organized groups that seek to influence government policy by getting their candidates elected. They serve as a link between citizens and government, aggregating interests and mobilizing voters. Party systems vary, from one-party to multi-party, influenced by factors like electoral rules and social cleavages. Parties perform key functions in democracies, including candidate selection, voter mobilization, and policy implementation. Their formation and development are shaped by historical context, social movements, and charismatic leaders. Parties craft platforms based on ideologies, balancing appeal to their base with attracting swing voters.