In SQL Server there is a separate Server we install for SSIS but when we deploy a project it goes to SQL Server Database engine (Integration Services Catalogs, SSISDB).
What is the use of this Integration Services here? I'm new to this and couldn't find any article talking about this Integration Services login.
In SSIS, when you choose package deployment model and create a deployment utility ie Deployment manifest, at that time we have option of deploy it on integration services.
In SQL 2012+ By default we use project deployment which creates our .dtsx in SSISDB folder under Integration Service Catalog.
As said in comments, it is just for compatibility purpose now.
Here is a short demonstration of how to use it :
then click next :
Now you will be able to see the package inside MSDB folder. From here you can run the package as well as maintain it.
