WYSIWYG ( what you see is what you get ) Editor
General questions about Magento 2 WYSIWYG (what you see is what you get). WYSIWYG editor is simple layout editor. In magento CMS pages and blocks this editor makes entering the formatted text easier.
The WYSIWYG component is an adapter for the TinyMCE editor. WYSIWYG integrates editor’s instance into the Form component. It expects to receive complete widget declaration in the content option, which should contain both markup and the script responsible for creating the editor’s instance.
Also check below url for reference:
https://devdocs.magento.com/guides/v2.2/ui_comp_guide/components/ui-wysiwyg.html
