Structured Data (JSON-LD)
The Structured Data tab, inside the Page Manager dialog (the app labels it Structure Data), lets you insert JSON-LD Schema.org page-identification tags — the extra information search engines use to interpret your page content.

Why it matters
Describing your page content this way generally improves a site’s visibility in relevant search results and leads to more organic traffic.
Applying it
The workflow is a dropdown, not a hand-written schema: no exporting or importing is required. Browse the keyword list to locate the one that best identifies your business, organization, or creative work, and drill down as far as it’s useful — the cuisine your restaurant serves, your church’s sermon schedule, your business hours, and so on.
When you’re done, click Test with Google to see if it recommends any additional information.