The International Organization for Standardization (ISO; /ˈaɪsoʊ/) is an international standard-setting body composed of representatives from various national standards organizations.
Source: https://en.wikipedia.org/wiki/International_Organization_for_Standardization
ISO 9001 sets out the criteria for a quality management system and is the only standard in the family that can be certified to (although this is not a requirement). It can be used by any organization, large or small, regardless of its field of activity. In fact, there are over one million companies and organizations in over 170 countries certified to ISO 9001.
This standard is based on a number of quality management principles including a strong customer focus, the motivation and implication of top management, the process approach and continual improvement. These principles are explained in more detail in ISO’s quality management principles. Using ISO 9001 helps ensure that customers get consistent, good-quality products and services, which in turn brings many business benefits.
Source: https://www.iso.org/iso-9001-quality-management.html
The ISO 9000:2015 and ISO 9001:2015 standards are based on seven quality management principles that senior management can apply to promote organizational improvement.
The procedure is available at: https://www.wikihow.com/Apply-for-an-ISO-Certification