Today, one of my group members stained my suede jacket with permanent marker whilst discussing our business idea. After panicking, the first thing I did is type the sentence “how to get ink out of suede” into Google. The pages I end up at are online communities, in which people share their experiences on the same problem and provide me with the knowledge I need to remove the stain. This example might sound very familiar to you: There are more than 2550 of such communities worldwide! These online knowledge sharing platforms provide a space for social interaction where individuals can obtain knowledge and feedback and exchange opinions on certain topics, such as stain removal.