At planned intervals the organization carries out internal audits that tell it whether its QMS meets both its own requirements and those of the standard, and whether the system is effectively implemented and maintained. It plans, sets up, runs and maintains an audit programme that fixes how often audits happen, the methods and responsibilities, what planning must cover, and how results are reported, weighted by how important each process is, by changes that affect the organization and by what earlier audits found. For each audit it sets criteria and scope; it chooses auditors and runs audits so that they are objective and impartial; it makes sure results reach the relevant managers; it takes suitable correction and corrective action promptly; and it retains documented information showing the programme was carried out and what it found.
This control maps to 45 controls across 31 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.