The IAB TCF Consent String is a set of coded characters/numbers that is passed on to various downstream partners and indicates a user's consent choices. It contains three main segments:

  1. Metadata concerning the consent (version of the TC String, last update, version of the provider list, etc.)
  2. The purpose for which the providers may use the data.
  3. Which providers have received the user’s consent.


Here is a link on how to decode your consent string: 
https://iabtcf.com/#/decode and the list of IAB vendors: https://iabeurope.eu/vendor-list-tcf/ .