A Facebook post will get half of its reach in the 30 minutes after it is published, according to updated data provided to MarketingCharts by Socialbakers. Socialbakers analyzed a select group of posts published on October 31st, finding that an average of one-third of post reach was obtained in just the first 10 minutes after publication. Previous data from Socialbakers has indicated that after the first half of reach is obtained in the 30 minutes post-publication, the rest is attained in the following 7 hours.

via Facebook Posts Get Half Their Reach Within 30 Minutes of Being Published.