Tab 1: Pillar & Clusters

This tab is designed to build a machine-readable map of your site’s content hierarchy, proving your topical authority.

Designate as Pillar Page: Check this box to identify the current post as a main “Pillar” (a comprehensive guide on a core topic). When checked, the search box below will appear.
Search for a Cluster Page:Use the search box to find other posts/pages on your site that are sub-topics (Clusters) related to a Pillar. Clicking a result adds it to the “Selected Clusters” list.
Find Cluster Suggestions: Click this button to automatically scan your site for posts that share the same categories or tags as the current post, suggesting them as potential clusters.

This is where the magic happens. Based on your settings, SPP automatically builds the connections:

If you set a page as a Pillar, its schema will automatically include hasPart links pointing to all of its "Cluster" pages.

If a "Cluster" page is linked from a "Pillar" page, its schema will automatically include an isPartOf link pointing back to the Pillar.