Every feed group will have its own feed. Only the group members of the group will be able to view posts published on the group feed. As a group member, you can also post in the group feed by following the below steps:
1. Go to the Groups tab, click on the Group in which you want to publish your post, and click on the + icon (bottom right) 
2. Type in your post and click on the post button
-You can tag user(s) by using @ followed by the name (@Tina Lewis)
-You can use hashtags for better search and visibility of your post by using # followed by the tag (#GoodMorning)
-You can include various media files like documents, excel sheets, images, video files, gifs, etc.
-You can use the rich text editor to enhance your text (bold, italics, etc)
You can react and comment on any post on the feed. You can include a media file, hashtag and can also tag another user in your comment.