An online encyclopedia of the latest trends to help people stay up-to-date with the ever-changing society.
The encyclopedia's main feed would be organized chronologically (latest on top). It would be read like news. People would visit periodically to catch up on what came out since their last visit. High-concept summaries would be visible right from the main index. People could click to dig deeper into the subject.
Every topic is covered in simple terms both in written form and as a video explainer.
The encyclopedia would be searchable as well so that people could read up on past trends.
The subject could be explained in several layers of complexity. People could explore it as deeply as they want. The first layer would be just a basic overview in the simplest terms. The deepest layer would resemble a textbook or a digital course on the subject matter.
Missing trend/concept suggestions
When people can't find something that seems to be trending, they can suggest the topic to be covered. The encyclopedia moderators would prioritize adding new topics based on demand.
At the time of this writing, I'm willing to bet that most people over 60 wouldn't know how to begin understanding what a NFT (non fungible token) is and how they could get involved. Many people are not familiar with the underlying blockchain technology that makes NFTs possible. To get up to speed people would have to cover several topics leading up to NFTs.
To avoid unnecessary work, an adequate solution could be for the moderators to write a high concept summary then link to a dedicated Wikipedia page and a good existing youtube explainer.