Let's look at Twitter first. As the following graphic shows, there are over 100 million tweets a day currently (and growing rapidly), but 92% of all retweets and 97% of all replies happen with the first hour. After that, it's as good as gone.
As the above graphic shows, Facebook posts that are posted at the top of the hour receive the most comments, and posts at the end of the hour get the least. Also, as I've pointed out in a previous post, the best time for to post on Facebook is at 11AM, 3PM, and 8PM for maximum response.
These graphics just go to show that not only is the content crucial to your post being useful, but the timing as well.
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Check out my Big Picture blog for discussion on common music, engineering and production tips and tricks.
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