What is the definition of a system to system integration? System to system integration is a type of software integration that allows two different software systems to communicate with each other and share data. System to system integration is often used when different software systems need to work together, such as a customer relationship management (CRM) software used in a business and an accounting software used to track financial information. System to system integration enables the two systems to communicate with each other, eliminating the need for manual data entry. This type of integration can be implemented in a variety of ways, including APIs, webhooks, custom connectors, and more. System to system integration can help reduce manual data entry, save time for businesses, and improve accuracy of data. It can also enable real-time data sharing and provide more complete insights into customer data. The benefits of system to system integration are clear, and businesses should make sure to take advantage of it whenever possible.