Supply chain security is about making sure products and services are safe. It involves looking at the whole process from the start to the finish and making sure nothing bad happens in between. This means making sure the people involved in getting the product or service to you, such as the factory workers, truck drivers, and store owners, all do their jobs the right way. It also means checking to make sure no dangerous materials get into the product or service, or that no bad people are involved in the process.