Difference between to grow and to expand in Korean
성장하다·확대되다

성장하다to grow
성장하다 means "to grow." You use it when a person, plant, animal, or even a business becomes bigger or develops over time. It is often used for healthy growth or steady progress.

확대되다to expand
확대되다 means something becomes bigger, wider, or larger. You can use it for things like pictures, screens, places, or services when they grow in size or area. In English, it is often like “be enlarged” or “be expanded.”
The difference
확대되다 means something becomes larger in size, area, or scale. It is about spreading or increasing, not the natural or healthy development idea in 성장하다.