Step 1: Log in to your Firelist Dashboard and click on Segments.
Step 2: Click on Create New Segments.
Step 3: Select the lists or tags on which you want to run the segment. You can edit the Name and Description according to your convenience.
Step 4: On the next step you can select the Criteria and add Condition to the Segment. Use View Segment Button to check the data extracted from the Segment and Add to Tag to map emails to a new Tag
OOn the final step click on Save & Update to save the changes.