In Procore, a sub job allows you to compartmentalize job costs within a project. Once they are added to Procore (or imported via an integrated ERP system) you can monitor your project budgets and costs against them to help you better determine if you are making money on your project. For example, if your project is a multi-story commercial building, you might create a separate sub job for the build of each floor. Or, if your project is a multi-unit development, you might create a separate sub job for each individual structure.