These are logos and certifications which help consumers get assured of quality while purchasing goods and services. The organisations that monitor and issue these certificates allow producers to use their logos provided they follow certain quality standards. It is not compulsory for all producers to follow standards. However, the products that affect health and safety of consumers or the products of mass consumption such as LPG cylinders, food colours and additives, drinking water, it is mandatory on the part of the producers to get certified by these organisations.