We know the goal of using Scrum is to release at least 1 Product Increment per sprint. When releasing a product increment, the entire team must agree and have the same understanding of what the quality standards are for releasing the product.
In other words, DOD is a standard requirement documentation created and approved by the SCRUM team to ensure product quality at the time of release. DOD is Lifetime documentation that can be updated by the Scrum Team to ensure the quality of Product increments at each Sprint. There are several companies that have made DOD or minimum DOD as a guideline in the SCRUM team. But the DOD can be updated or added if the SCRUM team feels that something should be added so that the quality of the product increment is better.
