One RSPO credit represents the one tonne of palm oil product in the sense that for every credit bought, a premium goes to the producer that has put its efforts in making sure one tonne of palm oil is produced according to the RSPO Principles and Criteria. This way, you are offsetting your palm oil usage by investing in a more sustainable market. You can find out more regarding the RSPO Credits here: https://www.rspo.org/rspo-credits/introduction