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Every post should have a set of tags: describing the subject. In the information overload age filtering is becoming essential.

Tagging is available on any serious platform with lots of data. It can be used to search for or filter out posts to save time/energy.

Personally I skip about 95% of posts here -- a lot of that is based on the post's category.

Some e.g's of HN relevant tags (multiple could be used per post): Code, Software, AI, Crypto, Linux, Politics, History, Space, Math, Biology, Health, Robotics, Microsoft, Apple, Startup, Social Media, Study, Games, Entertainment, News

If readers don't want to use tags/filters they don't have to.