An organic post that a marketer pays to show in front of a targeted audience. This type of ad lives on the brand’s page even after the budget caps out.
A boosted post is a Facebook post that you put money behind to increase its reach. Also known as promoted posts, boosted posts differ from Facebook ads in that they start out as organic posts and then get additional paid reach based on your spend. Also, you can launch them directly from your Facebook Page without using Ads Manager. Like Facebook ads, though, boosted posts allow you to target a specific audience and set an exact boost duration and budget.