Like the hundreds of people already, I thought this was an amazing post. You have a great way of breaking things down into ways that the average reader will be able to understand and make actionable. I think this is a great resource for our readers, so I included it in my monthly roundup of the best SEO, social media, and content marketing articles. https://www.northcutt.com/blog/2014/02/january-resource-round-up-the-best-of-seo-social-media-and-content-marketing/
Hey Ted, thanks for the great questions! The peak times refer to your particular time zone, if you are targeting an audience that resides in the same zone as you. You can also use tools to find out when most of your audience is online. For example, Facebook has this built into their Page Insights. For Twitter, you can use https://followerwonk.com/. Many social posting tools also offer this functionality.