The first-party served impressions metric for Facebook and Instagram has been accredited by the Media Rating Council (MRC) since 6 March 2018. To merit continued MRC accreditation of the Service, Facebook and Instagram:

1. Adheres to the Council's Minimum Standards for Media Rating Research, and any applicable measurement guidelines issued by the Interactive Advertising Bureau and the Mobile Marketing Association;
2. Provides full and complete information to the Council regarding all details of its Facebook operation;
3. Conducts its measurement service substantially in accordance with representations to the subscribers and the Council, and
4. Submits to, and pays the cost of, thorough annual audits of the Service by CPA companies engaged by the MRC.

You can also view Facebook and Instagram accreditation letters.

* Nguồn: Facebook