On the app, tap the  icon at the bottom of the screen to go to the eyengage tab, where you'll be able to see all the posts and polls shared with staff.

You can filter by post type and category by tapping the  icon in the top right of the screen. Select the types/categories you want to see, then click Apply. 

You can like a post by tapping the  icon in the bottom left.

In the bottom right of a post, you will either see  Comment, or the number of comments. Tap on whichever it is to view the comments. You can add your own by typing into the text box at the bottom, then tapping  to post.