Why you should never, ever use a question mark on Twitter or LinkedIn (infographic)
Is it best to share on Tuesday or Thursday? Does it matter if your tweet is 15 words or 25? And does using a question mark really reduce your chances of viral growth?
Question marks significantly reduce clickthrough on posts aimed at both consumers and business clients. Posts with question marks get between 25 and 52 percent fewer clicks than other posts.
See on venturebeat.com