Shea Bennett

Previously on AllTwitter we’ve written a couple of posts that looked at how independent analysis of the user ID numbers on Twitter has led to estimates that the network now has about 260-70 million registered profiles. But what exactly are these user IDs, and how do you find yours? Essentially, Twitter assigns a unique ID to each person as they join the network. This ID is a number, and started at number 1, and is currently above 300 million.

Did you know that Twitter has 255 million active users who collectively send 500 million tweets each and every day? What if I told you that there are more than 50 million Facebook Pages, that 20 billion photos have been uploaded to Instagram or that 5 percent of all selfies on social media are shared on Snapchat? This visual from Digital Insights looks at the latest social media statistics for Facebook, Google+, Twitter, Instagram, LinkedIn, Pinterest, Vine, Snapchat, YouTube and blogs.

If you're trying to generate engagement, what's the optimum, maximum length of a tweet? 100 characters*, according to research from Buddy Media, outlined here in this great post on the Buffer blog , which looks at the ideal length of almost everything online.