Facebook organic reach is a measure of the number of people who see your content on the social platform when you don’t pay to boost that content. On the other hand, advertising and boosted posts on Facebook involve marketers paying the platform to make these promotions visible.
As time goes on, it has become harder for advertisers to leverage organic reach on Facebook. This decline is primarily due to changes in their algorithm, which promotes content you are connected with. But that doesn’t mean that this type of marketing still can’t be done on Facebook.