Great question! These are functional units of activity and how different enzyme potency is quantified (yay, science!). The most important thing, though, is knowing how these enzymes functions to help catalyze reactions. For instance, amylase breaks down starches and carbohydrates into sugars (dogs are bad at this one), protease breaks down proteins into amino acids, and lipase breaks down lipids (fats & oils) into glycerol and fatty acids.
Each of the digestive enzymes in Microflora is tailored towards a carnivore’s digestion.