Let us consider that you are running an E-commerce website. You have a long list of products(in millions) available, and you want to eliminate the duplicate product names that might be listed under different categories. For example, there are two different products named iPhone X and Apple iPhone 10 (both mean the same product, but why do we need different names?) Another instance I encountered was a case where Amazon was selling the same N-95 Masks on different names like - 1)Covid-19 Masks. Your final task is to rename all the duplicate names to one common name. But firstly, you need to find out the products which are having duplicate names.