80 PLUS Certification is a program that evaluates the energy efficiency of power supplies used in computers and other electronic devices. It ensures that these power supplies convert a significant portion of electrical energy from the wall outlet into usable power for the device, minimizing wasted energy as heat. Power supplies that achieve 80 PLUS certification must meet specific efficiency standards at various load levels, such as 20%, 50%, and 100% of their rated capacity. The certification is categorized into different levels, including Bronze, Silver, Gold, Platinum, and Titanium, with each level representing higher efficiency and lower energy consumption.