Key features of an effective electoral system include fair representation, accessibility, transparency, and efficiency. An effective system ensures that all voices are heard, often through proportional representation, thereby reflecting the electorate's diversity. Additionally, it should be accessible to all eligible voters, minimizing barriers like complex registration or voting processes. Transparency in the electoral process helps build trust in the outcomes, while efficiency ensures that elections run smoothly and results are processed promptly. Ultimately, a well-designed electoral system strengthens democracy and promotes public faith in political institutions.