Collective Intelligence refers to group intelligence which emerges from collaboration, collective efforts and competition.
So how does collective intelligence work?
Take 4chan (as an example:
People go on 4chan to work together to find the location of ISIS. They do this by watching the videos they upload, analysing them and posting about their findings on 4chan. People on 4chan collectively found an ISIS training camp where they sent the whereabouts to the government.
Take a look for yourself: https://imgur.com/gallery/NpC7k
It goes without saying that collective intelligence can be used as a way of working together to make a job easier.
Just imagine how quick various tasks would get done if one group of people worked on them all at once to complete it. Even better imagine at uni everyone working on the lecture notes to collectively type them up quicker…