There is one more way to import the emails from one csv field to Recipients without creating the workflow.
Go To Home -> Profiles And Targets -> Jobs. And create a new Import Job there. Map the fields from csv file & select the Recipient Folder where you want to import the recipients and start the job. All the recipients will be imported to respective folder.
In order to import data into Campaign classic . Create a workflow and use a data loading activity to import the data into campaign followed by an list update activity so you can create an list of recipients as well.
Alternatively you may also refer to the support documentation for importing data and creating list