Saved Searches are lists of contacts that meet the criteria of a search (opened a certain email, clicked a certain link, have a certain keyword or date field filled, etc.). These Saved Searches are continuously updated based on their search criteria so you don’t have to worry about updating manually. You can also treat them like lists / groups by sending emails to them.
Take these steps to create saved searches through email reports:
1. From within the appropriate email's report, select the “View List” option next to one of the links or actions (opens, un-opens, click-throughs etc.).
2. In the pop-up window, click “Save As Search/List”, name the saved search, and click “Save as New Search.”