What is the real world example for linked list?

If you are referring to the Linked Lists used in programming:

You can use the Linked lists you learn in c++ (for example) to define actual shapes in OpenGL (a graphics library), then just 'call' the shapes and apply transformations to them (moving them around, rotating, etc).

This method saves a lot of bandwidth between your CPU and video card as the shapes are defined already.

Hopes this answers your question