Creating a new campaign by duplicating an existing campaign would copy all the Email Steps and Campaign Settings. It is important to note that the prospects of the existing campaign will not be assigned to the new campaign.
Steps to duplicate a campaign --
Step 1: Click on Campaigns page on top
Step 2: Go to the particular campaign you wish to duplicate and click on the Create Duplicate Campaign button.
Step 3: Click on Create Duplicate Campaign again and a new campaign with similar settings and email steps as the old one is created