More work on readme

Author: brandonkelly

README.md

@@ -37,8 +37,12 @@ composer require craftcms/webhooks
 
 To manage your webhooks, go to Settings → Webhooks in your project’s Control Panel.
 
+### Webhook Groups
+
 Webhooks can optionally be organized into groups. You can create a new group by clicking the “New group” button in the sidebar.
 
+If a group is deleted, any webhooks in it will become ungrouped. (They will **not** be deleted along with the group.)
+
 ### Creating Webhooks
 
 To create a new webhook, click the “New webhook” button.
@@ -69,6 +73,12 @@ The attributes listed here (separated by newlines) will be passed to the `$extra
 
 For “Extra Event Attributes”, each attribute should be prefixed with the name of the property and a dot (e.g. `element.author` will include the `author` attribute of an `$element` property).
 
+### Toggling Webhooks
+
+Webhooks can be enabled or disabled from both the Webhooks index page and within their Edit Webhook pages.
+
+Only enabled webhooks will send webhook requests when their corresponding events are triggered.
+
 ## Integrating with Task Automation Tools
 
 ### Zapier