What it means?

HPP is not as harsh on foods as heat processing is, keeps food fresher

How it applies?

The meat is put inside a vessel and water pressure is used to kill any sort of bacteria, such as e. coli.

Additional info?

Although HPP is a great alternative to heat processing, it is still a form of processing that the food has to go through. When the food goes through HPP, there is no differentiation between probiotics and bad bacteria, so while the bacteria may be killed, so will the probiotics on the food.