A way for a model to keep learning as new data arrives.
Online Learning is like a barista with a scary good memory. Correct your order today, and tomorrow your oat milk is safe.
It fits fast-moving feeds, ads, and fraud checks. It learns fresh patterns fast, but it can learn fresh junk too.
Supervised Learning
Online Learning is an incremental update style of Supervised Learning.
RL
RL often updates online while it interacts with the world.
FL
Online Learning can work with FL, so devices learn locally and share updates.