Facebook Algorithm 2026: How the Ranking System Actually Works
You still post on Facebook the way you did in 2019, a photo, a caption, maybe a link, and expect friends and followers to see it. In 2026 that approach reaches a fraction of the audience it used to, because Facebook does not really work like that anymore. It has quietly become an AI discovery engine that behaves far more like TikTok than the Facebook most business owners grew up with.
In 18 years running Optimise Your Marketing from Cromford Mills in Derbyshire, I have watched East Midlands businesses keep pouring effort into the same static post format, wondering why reach keeps shrinking year on year. The platform changed. The posting habits mostly have not.
This post expands on a point I made in our guide to how algorithms fit into every part of the BIG12: Facebook's algorithm now works as a four-stage AI discovery engine, rather than relying purely on friend activity. Here is exactly how it works.
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Take the BIG12 ScorecardThe Four-Stage Discovery Engine
Facebook's ranking system now runs through four distinct stages before a post reaches a feed: inventory, signals, predictions and relevance score. Inventory gathers every possible post a person could see. Signals collect data on the content and the user's past behaviour. Predictions estimate how likely that specific person is to engage, share or hide the post. Relevance score combines all of it into a single ranking used to decide placement. This is a fundamentally different model from friend activity chronologically appearing in a feed, and it means reach now depends far more on content quality than on your existing follower relationships.
Video Has Been Unified Under Reels
All video on Facebook, regardless of length or original format, has been unified under the Reels system. Short-form video is now close to essential for organic reach, and static image posts without any video component are increasingly the weakest-performing format available to a business page.
Completion beats clicks
Full video completion is weighted far more heavily than raw click counts. A short video watched to the end will consistently outperform a longer video that gets clicked often but abandoned early.
Facebook stopped being a place where friends see your posts by default years ago. It is now a discovery engine deciding, stage by stage, whether your content earns a place in front of a stranger who might become a customer. Stuart Baddiley, Optimise Your Marketing
Comments and Saves Now Outrank Likes and Passive Shares
The signal hierarchy has shifted noticeably. Comments and saves are weighted above likes and passive shares, because they demonstrate active intent rather than a low-effort tap. Content designed purely to be liked will consistently underperform content designed to prompt a genuine comment or a save for later.
Native Content Is Preferentially Promoted
Content filmed directly by the creator or page, rather than repurposed from elsewhere or produced by a third party with the branding stripped, is preferentially promoted. This mirrors the same originality signal running through nearly every major platform in 2026, and rewards businesses willing to film content specifically for Facebook rather than recycling it from Instagram or TikTok unedited.
When a Derbyshire retailer moved from static posts to native video
A retail client across the East Midlands had relied almost entirely on static image posts, with organic reach falling steadily for over a year. We shifted their content plan to short, natively filmed video built for completion rather than clicks. Organic reach grew by more than 90% within six weeks, without any additional ad spend.
See how we approach Social MediaHow This Connects to the BIG12 Framework
Facebook sits inside Social Media, but the same pattern runs through the whole BIG12: platforms increasingly reward genuine, native, active engagement over passive habits and recycled content. Derbyshire businesses who understand this stop treating Facebook as a static broadcast channel and start treating it like the discovery engine it has become. We cover this properly in our online marketing training, and in our wider guide to where algorithms fit into every part of the BIG12.
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Take the BIG12 ScorecardThe challenge is never learning. It is doing.
Knowing that video completion beats clicks is the easy part. Actually rebuilding a content calendar around native short-form video, shooting it consistently, and shifting away from static posts that used to work, that is where most Derbyshire and East Midlands business owners run out of time.
That is the gap we close. In 18 years of applying the BIG12 for UK SMBs, the pages that grow on Facebook are never the ones posting the most links and photos, they are the ones filming consistently, natively, with completion in mind.
If your Facebook reach has quietly shrunk over the last year, it is worth finding out whether the format, not the content, is the real issue.
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