This is just a quick tip to show you how to define and accept parameters into your Visual Builder Cloud Service applications when they are invoked from the outside.
Parameters can be passed on the URL of the pages or flows that you are invoking - this makes it very easy for other apps to integrate with VBCS apps and open pages in VBCS that show specific data. This approach also makes it possible to bookmark pages in VBCS that will show specific data based on the parameter.
To create an input parameter in VBCS, simply create a variable in the page or flow you want to invoke, and mark this variable as an input parameter. You can then indicate that this parameter will be passed on the URL through another checkbox.
In the video below you can see how to define a parameter, how to use it to filter a table to show specific records, and how to pass this parameter on the URL - by adding ?paramName=Value to the end of the URL.
Note that when you are doing internal navigation between pages in VBCS, and one of the pages is expecting a parameter, in the navigate action that you use in the action flow you'll be able to set the value for that parameter.