News Feed is the constantly updating list of stories in the middle of your home page. News Feed includes status updates, photos, videos, links, app activity and likes from people, Pages and groups that you follow on Facebook.

Kinds of news feed you will see on Facebook
Posts that you see in News Feed are meant to keep you connected to the people, places and things that you care about, starting with your friends and family.

Posts that you see first are influenced by your connections and activity on Facebook. The number of comments, likes and reactions a post receives and what kind of story it is (example: photo, video, status update) can also make it more likely to appear higher up in your News Feed.

Posts that you might see first include:

A friend or family member commenting on or liking another friend's photo or status update.
A person reacting to a post from a publisher that a friend has shared.
Multiple people replying to each other’s comments on a video they watched or an article they read in News Feed.
Keep in mind that if you feel you're missing posts you'd like to see, or seeing posts in your News Feed that you don't want to see, you can adjust your settings. https://www.facebook.com/help/371675846332829?helpref=faq_content

Your News Feed includes posts about your friends’ activity on Facebook, including when your friends comment on posts from people you’re not friends with. You also might see posts about your friends commenting in public groups that you're not a member of.

If you don’t want to see posts in your News Feed about a friend’s activity on Facebook, you can:

Unfollow that friend.
Learn how to adjust what you see in your News Feed.
Learn how to hide posts you don’t want to see.

Sometimes a post that you’ve already seen will move to the top of News Feed because many of your friends have liked or commented on it. This helps you see popular posts and conversations that your friends are interacting with the most.

If you feel you're missing posts you'd like to see, or seeing posts in your News Feed that you don't want to see, you can adjust your settings.

When you share something, people you include in the audience of the post may see it in News Feeds.

Learn how to change the audience of something you've shared.

Your News Feed should be filled with updates from the people and Pages you follow. If your feed is blank, close and reopen Facebook to refresh your News Feed. If that doesn't work, please learn how to report a problem with Facebook.

It can be frustrating not having your News Feed work properly, and we're working hard to improve the experience.

If older stories aren't properly loading on your News Feed, please let us know.

Your posts should show up right away on News Feed for your selected audience.

If your posts aren't appearing, let us know. We understand that this can be frustrating, and your feedback can help us improve the experience.

To help connect people to the posts that matter to them most, we use a process called ranking. News Feed ranking creates a personalized and diverse stream of posts from the people, news sources, businesses and communities you’ve connected with on Facebook.

What influences ranking
Some things influence ranking more than others, and some of the most important factors include:

How often you interact with posts from friends, groups or Pages (friends and family are prioritized).
If the type of post is something you often interact with (example: photo, video, link).
The number of comments, likes, reactions and shares a post receives from the people and Pages that see it. Keep in mind that these posts are shared by the friends, groups or Pages you follow.
How recently something was posted.
Some things have a smaller influence over what you see. We may take into account signals such as how fast your internet connection is right now or what kind of phone you're using (because this can affect how quickly things can load on your News Feed). These are just some of the thousands of signals that may be considered for News Feed ranking.

Why some friends and Pages are prioritized
Certain friends and Pages are prioritized in your News Feed based on your activity on Facebook or if you've added them to Favorites. Their posts are shown higher in your News Feed. Certain factors that have more influence for who is prioritized include, for example:

Your past interactions on posts of friends or Pages, like reacting to or commenting on a photo or video.
Things you have in common, like mutual friends or groups you both belong to.
Many other factors also influence who is prioritized. The friends and Pages that are prioritized on News Feed can change based on your activity on Facebook.

Only you can see who is prioritized in your News Feed. You can control whose posts are prioritized even higher on your News Feed by adding them to Favorites.

Manage what you see
You can control what you see from your News Feed preferences or check your privacy settings. Some of the options for managing what you see in your News Feed include:

Select a person or Page to add to Favorites.
Snooze a person, Page or group.
Hide or unfollow posts from people, Pages or groups.
To see what influences the order of posts you're seeing in your News Feed:
Go to the post.
Click in the top right and select Why am I seeing this post?

https://www.facebook.com/help/1155510281178725/how-news-feed-works/?helpref=hc_fnav