Syncs help in determining how the data appears in your destination. They are used to map the data from the source to the destination.In order to create a sync, you need to have a source and a destination. The source is the data that you want to sync and the destination is where you want to sync the data to.
Full Refresh Syncs: This sync type replaces all the data in the destination with the data from the source. This is useful when you want to replace all the data in the destination with the data from the source.
Incremental Syncs: This sync type only syncs the data that has changed since the last sync. This is useful when you want to sync only the data that has changed since the last sync.
Streams: Streams in AI Squared are referred to the destination APIs that you want to sync the data to. For example, If you want to Sync the data to Salesforce, then Account, Contact, Opportunity are the streams.