Food shortage due to climate change, which is a critical threat, requires an urgent solution. On the other hand, crops and cereal crops used for domestic livestock and poultry production as a source of quality and healthy protein create economic problems due to competition in both the resources and the land used in their production. Microalgae have been identified as a potential alternative raw material for animal feed due to their high content of carbohydrates, proteins, lipids, vitamins, minerals, and other high-value products. The utilization of microalgae presents a promising alternative to conventional feed and food sources, capable of mitigating some of the impacts of climate change on food production systems. This chapter aims to investigate the potential of microalgae as a sustainable feed source, with a spotlight on their economic viability, nutritional value, and environmental benefits. By integrating microalgae into feed systems, we can address some of the pivotal challenges posed by climate change while fostering sustainable agricultural practices.