The aim of the methodology is to provide uniform and comprehensive information on silage additives and products so that all relevant and necessary information is available to farmers in one place, and so that this information can be used for decision-making in the operational process of silage preparation. The methodology includes the division of silage products, the procedure for selecting a silage product, selected activities of the authors of the methodology in the field of silage research, an overview of legislation and a list of products available on the Czech market.