Donating plasma is a simple way to earn extra money by donating plasma, the liquid part of blood, up to twice a week. Plasma is used to create treatments for conditions like hemophilia and immune deficiencies. Donors must be at least 18 years old, weigh over 110 pounds, and pass a health screening. The donation process takes about 1.5 hours, and donors are compensated $45 or more per donation. Donating plasma provides financial benefits while helping save lives through plasma treatments.