A killer application is an essential piece of software or feature that significantly drives growth and increases sales for the platform or company it's associated with. It's often compared to a flagship product or service that a brand in traditional industries would offer as its signature item. Historically it was used to describe a particularly innovative application used in computers and gaming systems, such as graphic programs or video games that sold so well that they single-handedly drove the sales of their associated computer platform. Today the term can be used more broadly to refer to anything that provides a huge competitive advantage for a company, from innovative marketing tactics and customer service policy, to well-executed social media campaigns built around inspiring content.

Killer applications provide a huge competitive advantage to the companies that possess them. They create customer loyalty and brand recognition, while generating steady streams of revenue. Killer applications can give small companies a unique edge in the competitive market, while large companies usually rely on the power of their network effect and the reputation of the brand to maintain the success of their killer application.

For example, a popular mobile app developer may create a must-have gaming application for their phone. It drives their sales and customers to the company, resulting in increased revenues and market penetration. Or, a company may launch a new customer service feature that becomes its flagship offering. In this case, it may become the “go-to” application for customer service inquiries, resulting in improved customer satisfaction and more repeat business.

In the modern economy, businesses of all sizes are looking to discover their own unique killer applications. From start-ups offering high-impact services to large companies launching innovative products, the race is on to discover the next big thing. Companies are investing in research and development, hiring amazing staff, and jumping at opportunities to make their mark on the industry and become the standard-bearer for excellence. No matter what industry you're in, a killer application could be the key to revolutionizing the way you do business.