Core Concepts
Global Queries
Set a query once and reuse it across layouts.
A Global Query is a custom query composed from a global source which is then made available as Dynamic Content option globally. When used wisely it can help speed up the creation of layouts that use the same complex queries over and over.
Global Queries Manager
The Global Queries Manager can be accessed at Customizer -> Essentials -> Global Queries
section. There you can manage the queries for any source that is globally available.