Flow Solutions are pre-built flows or templates that can be installed from AppExchange and customized to meet specific business needs. For example, Flow Solutions can provide common use cases such as lead generation, document generation, payment processing, and more. In this case, the administrator can use a Flow Solution that provides a mortgage calculator and generates leads for loans. Flow Solutions are easy to install and configure, and can help save time and budget for projects. Reference: https://help.salesforce.com/s/articleView?id=sf.flow_solutions.htm&type=5