Business intuition in data science

Often when we think of a data science assignment, the main thing that comes to mind is the algorithm technique that needs to be applied. While, that is crucially important, there are many other steps in a typical data science assignment that requires equal attention. There is an online retailer, who is running a shopping festival in the month of November, just before the holiday season. It has a catalogue of a million products and a database of 100 million customers, who had bought from them in the past. The retailer wants to do promotional email campaigns to its customer base.