The document provides instructions for using a device called GemmaCert to test the water activity (Aw) of cannabis before storage or transport. It explains that an Aw level between 0.55-0.65 is optimal as it indicates the flower is dry enough to prevent mold growth but not too dry that it loses potency. Any Aw level above 0.65 indicates the flower is too moist and at risk for mold, while below 0.55 means the flower is very dry and potency may be reduced. The test takes minutes and provides the Aw reading on a smartphone to help determine if the cannabis is safe for transport and storage or presents a health or profit risk.