The main goal of PETA (People for the Ethical Treatment of Animals) is to advocate for the ethical treatment of animals and to promote animal rights. PETA focuses on four primary areas where animals suffer the most: in laboratories, in the food industry, in the clothing trade, and in the entertainment industry. The organization aims to:

1. End Animal Testing: PETA campaigns against the use of animals in scientific experiments, advocating for alternative testing methods that do not involve animals. They work to expose and stop cruel practices in laboratories and push for legislation that protects animals from being used in research.

2. Promote Vegan and Vegetarian Diets: PETA encourages people to adopt plant-based diets to reduce the demand for meat, dairy, and eggs, which they argue are products of industries that exploit and harm animals. They provide resources and information to help people transition to vegan or vegetarian lifestyles.

3. Combat Animal Cruelty in the Fashion Industry: PETA is well-known for its campaigns against the use of animal fur, leather, wool, and other animal-derived materials in fashion. They advocate for cruelty-free alternatives and work to raise awareness about the suffering animals endure in the fashion industry.

4. End the Use of Animals in Entertainment: PETA opposes the use of animals in entertainment, such as in circuses, zoos, marine parks, and movies. They argue that these practices often involve significant suffering and stress for the animals and advocate for more humane forms of entertainment.

Overall, PETA's mission is to establish and defend the rights of all animals, believing that animals are not ours to use for food, clothing, experimentation, or entertainment. They use a variety of methods, including public education, research, legislation, and direct action, to achieve their goals.