Syncing keeps the integration registration of a particular workspace up-to-date with the integration definition (created in the integration builder). Syncing is also how you register the integration to a workspace for the first time.
When you first create an integration, a development workspace is automatically created for you to do testing. You still need to sync the integration definition with this workspace periodically in order to see your updates and complete testing.
To sync the integration with a customer workspace, you need to create the customer workspace and add the integration. For more information, see Create Customer Workspace.
Complete the Synchronization Process
There are a couple of ways to sync an integration registration so that is up-to-date with the integration definition.
From a workspace:
Open the Integration page from your workspace.
Select Sync.
The integration is now registered to your workspace, and the integration definition is synced.
From the Integration Builder:
Open the integration.
From any of the pages in the Integration builder, select the More menu (the three dots), then select Sync.
This syncs that particular feature in the integration definition to your workspace.