In-Memory computing is a technology that allows for the processing of massive amounts of data in real-time by storing the data in RAM rather than on disk. It enables business leaders to make decisions in real-time based on the most up-to-date information. Retailers can use in-memory computing to analyze customer data from various sources and send targeted offers to customers on their mobile devices while they shop. In-memory computing achieves real-time analytics and data sorting by minimizing data movements and speeding up data access times by storing information in RAM rather than on disk for faster retrieval.