There are so many types of ISO standard but mainly below are some most popular ISO standards.
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Quality Management System
Food Safety Management Service
Information Security Management Service
Security Controls for Cloud Services
Quality Management System for Medical Devices
Occupational Health & Safety Management System
ISO certification certifies that a management system, manufacturing process, service, or documentation procedure has all the requirements for standardization and quality assurance.
On providing the correct documents and information of your business you can obtain the final certificate within 2-3 working Days.
An ISO audit is an audit of your organization's compliance with one of the standards set forth by the International Organization for Standardization (ISO)