It looks like Facebook has changed and renamed some features over time, so the "Guides" feature may not be available in its original form for all groups. It was previously called "Units." However, the functionality for organizing content still exists.

Here is a step-by-step tutorial on how to add and use the "Guides" feature, based on the most recent available information.

Prerequisite
You must be an admin or a moderator of the Facebook Group to add or create Guides.

Step 1: Add the "Guides" Feature to Your Group
Navigate to your Facebook Group and go to the Group settings.

On the left-hand toolbar, scroll down to the "Other features" section.

Click on "Add New" or "Add features."

Find "Feature sets" and look for the option to add "Guides."

Click on "Add set" or "Add feature" next to the Guides option.

If you cannot find "Guides," it may be called "Social Learning" or "Learning Set" and you may need to select that to enable the Guides functionality.

Step 2: Create a New Guide
Once the feature is enabled, you'll be able to see the "Guides" tab on the homepage of your group, under the cover photo.

Click on the "Guides" tab.

Click on "Start a New Guide" or "Create a Guide."

Give your new guide a title and an optional description. The title should be engaging and reflect the content of the guide (e.g., "Getting Started Here," "Photography Tutorials," "Group Rules").

Click "Save."

Step 3: Add Posts to Your Guides
You can add both new and existing posts to a guide.

To add an existing post:

Find the post you want to add in the group's feed.

Click the three dots (...) in the top-right corner of the post.

Select "Add post to Guide."

Choose the specific guide you want to add the post to.

To create a new post within a guide:

Go to the "Guides" tab and open the guide you want to add the post to.

You should see an option to "Create Post" or "Add Post."

Write your post as you normally would, and it will be automatically added to that guide.

Tips for Using Guides Effectively
Organize Your Content: Guides are perfect for creating an organized learning path. For example, you can create a "New Member" guide that includes a welcome post, group rules, and a FAQ.

Use them as a Resource Library: Put all your most important or valuable posts in a guide so members don't have to scroll through the entire feed to find them.

Reorder Posts: You can easily reorder the posts within a guide to create a logical flow. This is especially useful for tutorials or a step-by-step process.