Every other product on this page controls the physical environment around your fodder — keeping air and light out. The inoculant works from the inside: it's a concentrated culture of beneficial bacteria (typically lactic-acid-producing strains) that you mix into the fodder as it's packed, so the fermentation that happens inside a sealed bag or bunker is driven by the bacteria you've added rather than whatever wild bacteria happen to be present on the crop.
This matters because fermentation speed and quality directly affect how much nutritional value survives the storage process — a faster, more controlled fermentation drops the pH quickly, which is what suppresses the spoilage organisms that would otherwise eat into your fodder's feed value. Used correctly alongside proper sealing (any of our bags or the bunker cover), it's a low-cost way to protect the nutritional quality of fodder you've already invested time and land into growing.