This step allows to filter entities and reduce the number of data to be processed in the following steps.
This is quite usefull to work particularly with the information you need and to transform it easily.
In this example, you can select the category you want to work with:
From now on, we will work only with "Capital Accounts", in this way we threw the rest of the entities.
Then, click "Save" and the Pipeline will row and it´s done!