BuddyPress community owner to pin a post to the top of the activity or a group page.
Only community admin and Group administrators can pin and unpin posts.
To access the setting of Sticky Post Navigate to WB Plugins >> Sticky Post >> General Setting and configure them.
Pin Post Label
Allows you to set button text to pin the activity.
Unpin Post Label
Allows you to set unpin label.
Pin Ribbon Color
Allows you to change the color of the ribbon.