The SSIS Catalog or SSISDB catalog (or Integration Services Catalog) is very important to work with the Interrogation service projects. I must say, It is an essential requirement to deploy SSIS packages.
This section explains the step by step approach to create the Integration Service or SSIS Catalog with an example. To create an SSIS catalog, first, open the SQL Server Management Studio. Under the Object Explorer window, Please navigate yourself to the Integration Services Catalogs folder, as shown below.

Steps to Create SSIS Catalog
If you or your team member already created before, then they will appear under this folder. If not, right-click on the folder will open the context menu. Please select the Create catalog.. option.

Once you select the option, a new window will open

To create, or use the SSIS catalog, you have to select the Enable CLR Integration option.

Please checkmark the Enable automatic execution of Integration Services stored procedure at SQL Server Startup option, and provide the password.

Once you click the OK button, it will start creating the Integration Service catalog.

From the below Management Studio screenshot, you can see that we successfully done.

Let me create a new folder. To do so, right-click on the newly created SSIS Catalog, and select the Create Folder… option from the context menu.

Once you select the Create Folder.. option, a new window will open to create a new folder. Please provide the folder name and valid description. When you deploy projects from BIDS, you have to select this folder.

Now you can see the newly created folder. If you observe closely, Integration Services automatically added the Projects, and Environments folder to store the SSIS Packages, and variables.
