A Certificate of Analysis, or COA, helps ensure that a product is manufactured to certain specifications and indicates the quantity of cannabinoids found in that product, such as CBD. In addition, the certificate shows details on the level of any heavy metals, pesticides, solvents, and THC that are found in tested product. COAs are intended to keep consumers safe and informed about products that they use, but they also can be a good indicator of the quality of a product.