tl;dr: "A database of relevant information with a quality / spam filter, stuff which pulls in more information, some AI, a filter that throws out useless data,

tl;dr: "A database of relevant information with a quality / spam filter, stuff which pulls in more information, some AI, a filter that throws out useless data, corrects itself based on previous performance, a bit which personalises the results based on the user, a bit which puts the data together in a useful format, and a bit that identifies and blocks SEO." Reddit and google are both prior art, I think. But they forgot to mention that you are applying this general approach to pedestrians.