Drain your chickpeas and reserve the liquid - this is your aquafaba. Place in a large mixing bowl.
Using a hand or stand mixer (highly suggest a stand or electric hand mixer, as it takes a long time, and will produce better results), start whipping the aquafaba until peaks start to form. This will take 5-6 minutes to get semi-firm peaks. Take your time, and be patient!
If you want stiffer peaks, consider adding some vinegar or lemon juice.
Use your aquafaba as a whipped egg white substitute, as a base for vegan mayo, in desserts like macaroons and meringues. Use the aquafaba UNWHIPPED as an egg binder/replacement for recipes that call for whole eggs. One egg yolk: 1 tablespoon aquafaba; one egg white: 2 tablespoons aquafaba; one whole egg: 3 tablespoons aquafaba