What is aggregating information and how does it work? or Can someone explain what is aggregating info

So, what is aggregating information? It’s like making a mixtape but for facts. You take bits from here and there, cut out the noise, and keep the good stuff.

Reddit’s r/all is a loose example—it aggregates popular posts from all subreddits. Not perfect, but you get the idea.

Ever used an aggregator? Some are hit or miss, but the good ones? *Chef’s kiss.*