The International Organization for Standardization (ISO) is an independent, non-governmental international organisation with an international membership of 163 national standards bodies. The ISO/IEC 27000 family of standards helps organisations keep their information assets secure.
ISO/IEC 27001 outlines and provides the requirements for an information security management system (ISMS), specifies a set of best practices and details the security controls that can help manage information risks.
Shop sales is ISO/IEC 27001 compliant. The 27001 standard doesn't mandate specific information security controls, but the framework and checklist of controls that it lays out allow Google to ensure a comprehensive and continually improving model for security management.