Discuss what is the bottom of the pyramid? Why are companies such as Siemens, GE, Nestl, and Procter & Gamble targeting the "bottom of the pyramid"?

Research and read about the concept of "Bottom of the Pyramid " from a stratgeic and marketign standpoint. There are many articles available online, with one being "https://www.strategy-business.com/article/The-New-Fortune-at-the-Bottom-of-the-Pyramid"

Once you have read and understood the concept and share your point of view on the concept and why companies are targeting the "bottom of the pyramid" with example