Spirulina, a dietary supplement par excellence, is an algae very rich in proteins, vitamins and mineral elements. The objective of this synthesis is to report on the state of knowledge on the production, composition, processing and use of spirulina. This work was carried out from a bibliographic study. Thus, the results of studies have shown that all stages of spirulina production require compliance with a number of parameters. These include the choice of land and type of basin, culture medium, agitation system, maintenance and rigorous monitoring of crops. Spirulina is an algae which has a thermophilic character and a significant need for light, this particularity of spirulina limits its distribution area to an intertropical band located approximately between 35 ° North latitude and 35 ° South latitude. The chemical composition of spirulina gives it a wide potential for use, especially in human and animal food, in aquaculture, cosmetics, pharmacology, etc. Valuation trials were also tested.