Good Manufacturing Practice (GMP) means doing things the right way when making products. It's like baking a cake. If you forget to add salt or put too much sugar, the cake won't turn out right. But, if you follow the recipe and baking instructions carefully, you get a delicious cake.
GMP is a set of rules that the government and industries created to make sure all products are made the right way in a clean and safe environment to ensure that they are safe to use. GMP helps to guarantee the consistency of the quality of the product, from the way it's produced to the way it is packaged and shipped to the store.
For example, if you make medicine, GMP means that you have to follow strict rules on how to make the medicine, the equipment you use, and how to clean it. The ingredients have to be checked and monitored at each step in the production process to make sure they are safe and effective. The manufacturing plant has to be clean, and the staff needs to wear protective clothing, including gloves, masks, and hairnets, to prevent any dirt or germs from getting into the product.
In simple terms, good manufacturing practice ensures that products are made the right way, are safe to use, and will work the way they're supposed to work.