The chapter about the CPI (Consumer Price Index) in Who Is Government? edited by Michael Lewis, was interesting and helped me understand what we read and hear about all the time.
I had a general idea of what the CPI means but John Lanchester's explanation of it in the chapter, The Number, made it much more understandable,. As he points out the CPI is an imperfect indicator but gives us a rough idea of how the economy is functioning. Most Americans though have no idea about this concept and its use.
The economy under Biden was doing great, one of the best in the world, but people focused, supposedly, on the "price of eggs" if you believe the pundits, and elected Trump who has trashed the economy with his tariff nonsense. We are in for some very dark days in the coming couple of years due to his and his administration's incompetence.