Save As New Search allows you to take an existing search and duplicate its criteria and share settings into a new search, eliminating the need to start from scratch when creating a new search that is the same as or similar to an existing search.
To Save as New, run the search you want to duplicate and go to the details page. Click the Save As New button at the top right. Update the search name and description as you desire and click the save button. The copied search will now appear as a new search at the top of the search list page. You can run and edit it from there.