Certification can be a useful tool to add credibility, by demonstrating that your product or service meets the expectations of your customers. For some industries, certification is a legal or contractual requirement.ISO certification is a seal of approval from a third party body that a company runs to one of the international standards de... veloped and published by the International Organization for Standardization (ISO). ... Each ISO standard has its own benefits, for example ISO 9001 helps put your customers first.+ More