The best times to post on social media are when the people you want to see the content are on the network.
(This quote, like most of the content on these slides, comes from What 20 Studies Say About The Best Times To Post On Social Media. )
Post Life Spans
Facebook: 6 hours
Twitter: 15 minutes
Instagram: 24 hours
After these deadlines, the post will generate next-to-no engagement, because the platform algorithms will stop showing it to users.
This chart contains data from one YouTube media company, Frederator Networks, which resembles YouTube's general population in terms of age but includes more U.S. men than does YouTube's average.