The article provides a comprehensive overview of silage additives used in agriculture. The text analyzes in detail biological silage additives (inoculants), including the classification of bacteria into homo- and heterofermentative, their concentrations and effects. It describes chemical preservatives, their main active ingredients and mechanisms of action. It also discusses combined preparations that combine the advantages of both approaches. The article includes recommendations for application doses, discusses the economic aspects of the use of these preparations and lists the main world manufacturers and research centers in the field. The text emphasizes the importance of the correct selection of preparations for optimizing the fermentation process, reducing losses and preserving the nutritional value of feed.