Apparently, common townsfolk used to gather at such meeting points, making small talk, and hence the topics they discussed came to be described as "trivial", and hence the word trivia for any information that is of fleeting importantance and of general interest.
Common townsfolk used to gather at such meeting points and hence the topics came to be described as "trivial", and hence the word trivia for any information. This was apparently. They discussed the topics. This information is of fleeting importantance and of general interest. Such meeting points were making small talk.