In this support article, let us see how to add a sub-segment and organize your content. Learn how to create a segment if you haven't done it already.
How To Create Sub-segments
(Watch the video from 03:10s to 04:03s or read the entire steps below)
First, click on the unpublished segment and click on add sub-segment
For e.g: I can create multiple sub-segments based on various English language training courses like IELTS, TOEFL, CAE, CPE.

Add images in your subsegments and click on the create segment button to create the new sub-segment.

You can now add more sub-segments or contents within your sub-segments.

To publish the sub-segment, click on the publish button to make it LIVE.

Now go back to the segments and click on the enable button.

Conclusion
Note: You need at least 1 product in your segment or sub-segment to publish it.