IELTS is changing. Are you ready? #ielts

The video tutorial introduces the idiom 'shake things up', explaining it means to change something or the way you do something. An example is provided in the context of exercise, illustrating how one might use the idiom in a sentence. Additionally, the video mentions a free IELTS book available for viewers.

What is the purpose of the free IELTS book mentioned in the text?

How can asking about exercise relate to the idiom discussed?