The Tags view contains a list of all tags that you've created. To view the posts that contain a specific tag, select the Tags view and click on the required tag. Learn more.
The posts that contain a common hashtag can be listed by clicking on the hashtag. The posts that fall under this hashtag get listed in a new tab. Learn more.
In the Control Panel, navigate to the Groups section. Select the group whose member permissions you want to edit. Click the Edit icon across the respective user, edit the required fields, and click Save.