Currently, the electronics supermarket market is very active, with many companies competing, making the battle now not only take place at the point of sale, on traditional advertising channels but are spreading and becoming increasingly popular on social media. Especially, long-standing electronics supermarkets have promoted activities on social media to win back the attention of consumers. And when it comes to social media, it is impossible not to mention that Dien May Cho Lon currently has the third largest amount of discussion on social media due to regular promotions and electronic products that are constantly updated on the Facebook fanpage in the electronics supermarket market today. The success of Dien May Cho Lon thanks to the great contribution when the company applies CRM software in business activities.