ISO 27000 standards is a part of ISO/IEE information security management systems (ISMS) standards.
ISO 27000 provides information security management system for the organisations to manage and control information security risks.
ISO 27001 helps organisation to implement a system to manage information. The suppliers or customers needs the organisation to commit in protecting the information. The leakage of information leads to spoil the business relationship. Every business has its own secrecy and need to maintain the information intact.
ISO 27001 can assure the customer and business related person that the organisation is trustworthy to do business with.