Dataset recipe

So far we have created multiple datasets, such as opportunity, account, and quota. But we do not use all the fields in the dataset. So how do you remove them or what if I added a new field in Salesforce or to the external source of the dataset and I want to add that field to the dataset. We can use a data recipe user interface to do this. The data recipe provides the flexibility for the user to add required elements and to remove unnecessary elements. In the data recipe, you can map two datasets, side by side, and this results in a new dataset. 

What is a data recipe? 

A data recipe is a user interface tool that allows you to receive data from the existing datasets, replications, bucket fields...