The widely used platform for UPSC examination preparation resources is YouTube. It offers a plethora of free lectures, tutorials, and study materials from experienced educators and UPSC toppers. Many channels focus on specific subjects and provide guidance on the examination process, study strategies, and current affairs. The accessibility and convenience of YouTube make it an ideal resource for aspirants looking to supplement their learning. Additionally, various official UPSC sites and educational websites also provide valuable materials and insights to aid in comprehensive preparation.