How does the consent to track field work with Salesforce?

Campaign Monitor consent to track field is optional as some countries require or prefer tracking emails. It simply tracks whether you have permission to email the subscriber. You can find more information here https://help.campaignmonitor.com/permission-to-track.

In Salesforce, there is no standard field called permission to track. When we add or update a record in Campaign Monitor, the permission to track field will be unchanged by default. This simply means we won't change or influence that value. You can keep it updated from Salesforce by creating a corresponding field in Salesforce and mapping it to the Campaign Monitor permission to track using our import wizard or field mapping features.