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

Aggregating information is like gathering puzzle pieces from different boxes and putting them together to see the full picture.

For example, if you're tracking news, instead of visiting CNN, BBC, and Reuters separately, a tool like Feedly (feedly.com) pulls headlines from all of them into one feed. Saves so much time!

Kinda wild how much easier it makes research, right?