The instructions from this guide are referring to the WP Admin dashboard. You can get to this dashboard by adding /wp-admin to the end of your site’s url (e.g.: example.wordpress.com/wp-admin)
The Writer Helper is a tool that can help you write or finish your posts. You can find it on the Post Edit screen.
Request Feedback: Get feedback on a post or collaborate with a friend before you publish. Request Feedback helps you generate special links and send them to friends; the special links will let your friends see a post you choose before it’s published and send you their comments or suggestions for it. If you’ve ever copied a post into an email to show it to a friend before you hit publish, Request Feedback is for you.
The option to request feedback is only available on an unpublished post.
Copy A Post: It takes much work to get a post just right. Why not reuse that effort? Copy A Post lets you duplicate a post, including the title, contents, tags and categories, so you can start a new post without having to re-enter everything, if your want to re-use the same tags, categories and formatting.
Hiding Writing Helper
If you decide you don’t want to use Writing Helper and you’d like to get rid of it, you can hide it using the Screen Options menu by unchecking the Writing Helper box. The Screen Options menu can be found in the upper right corner of your Post Edit page.