This paper reviews the effects of herbal extracts on animal performance as feed additives. Feed additives are crucial for improving the quality of feed and animal-derived foods, enhancing animal health and performance. Herbal extracts, derived from plants, are added to rations to improve livestock performance and product quality. These extracts often contain bioactive chemicals such as flavonoids and glucosinolates, which have antioxidant, antimicrobial, anti-inflammatory, and other beneficial properties. They can enhance ruminal microbial activity, diet palatability, and stimulate digestion. The paper discusses the antimicrobial, antioxidant, anti-inflammatory, and immune-stimulating effects of herbal extracts, as well as their impact on feed palatability, digestion, and productivity in both ruminant and non-ruminant animals. The conclusion emphasizes the importance of herbal extracts in improving growth performance and product quality, while also highlighting the need to consider extraction methods, sources, and concentrations to ensure effective and safe use.This paper reviews the effects of herbal extracts on animal performance as feed additives. Feed additives are crucial for improving the quality of feed and animal-derived foods, enhancing animal health and performance. Herbal extracts, derived from plants, are added to rations to improve livestock performance and product quality. These extracts often contain bioactive chemicals such as flavonoids and glucosinolates, which have antioxidant, antimicrobial, anti-inflammatory, and other beneficial properties. They can enhance ruminal microbial activity, diet palatability, and stimulate digestion. The paper discusses the antimicrobial, antioxidant, anti-inflammatory, and immune-stimulating effects of herbal extracts, as well as their impact on feed palatability, digestion, and productivity in both ruminant and non-ruminant animals. The conclusion emphasizes the importance of herbal extracts in improving growth performance and product quality, while also highlighting the need to consider extraction methods, sources, and concentrations to ensure effective and safe use.