This document provides an overview and summary of SharePoint Framework extensions, including:
- Application customizers allow customizing UI elements when placeholders change.
- Command sets enable/disable commands and execute custom logic. They are available in context menus and top menus.
- Field customizers override cell rendering and disposal to customize individual fields.
- Extensions are deployed via elements.xml and can be deployed tenant-wide via client side component instances in SPFx 1.6.
- The presentation covers the roles, types, development, and deployment of SPFx extensions.