With the expansion of modern society, the need for proper nutrition, health, and food safety among people has increased significantly. Spirulina (Spirulina platensis), It is considered one of the most valuable microalgae with high production efficiency. It is known as one of the best dietary supplement options due to its unique nutritional and healthy properties. Spirulina, as a natural food supplement, has the ability to provide essential nutrients to the body and can play an important role in nutrition. In addition to supplemental applications, this substance is also widely used in the food, pharmaceutical and cosmetic industries. Spirulina powder can also be added to a variety of foods such as bread, cakes and biscuits to significantly increase the nutritional value of these products. Spirulina extract can also be used in the production of health and beauty products. In addition, the antioxidant properties and immune-boosting role of Spirulina make it a promising option as a natural drug in research related to the treatment of cancer and liver diseases. As a whole, vast application of Spirulina have been proved in aquatic nutrition, contribution to treat diseases, healthy antiaging properties, use in effluent purification, biofuel and power production, biodegrable film and solidifying cement in civil engineering. This article aims to provide comprehensive information about the nutritional composition, extraction methods, life cycle and beneficial effects of Spirulina in different fields and thus can contribute to the advancement of the Spirulina-related industry