Something we look at fairly regularly are things like character or word length and what is optimal for Search Engine Optimisation. That is, what is best for getting google and other search engines to notice your content.
But what is also important is Engagement. Particularly when it comes to your Social Media presence and marketing. so here is a helpful chart to guide you in how many characters or words will get you noticed. This could be by way of comments, likes, shares or weblogs, but also clicks back through to your web site from sociamedia.
Want to know the optimal video length is for say You Tube, thats also here.
Image courtesy of the Buffer blog.