# How does $CellContext work? The only official info about $CellContext I was able to find is:

placeholder for the context of a symbol inside Dynamic

I have some intuitive understanding how it works but I would like to know more and for sure.

Can someone explain authoritatively what is the purpose of it. And if there is possibility to manually use it for something useful?

Somehow I've overlooked this topic on MathGroup earlier: $CellContext Here's what John Fultz said: $CellContext is a symbolic placeholder in cell expressions (most typically Dynamic expressions inside of Cell) which indicates that the ambient context as defined by the CellContext option should be used (which allows you to wall off notebooks, cell groups, and cells from each other via automatically generated contexts).