You can download project to import workers. You can create recurring data job using this entity. More information about recurring data integration is available on this link.
This entity is helpful in scenarios where you want to do integration with other systems which are masters for worker data for example workday and you want all the changes for workers to flow in dynamics 365 for finance and operations.
Project contains entity and xml file which can be used in data project and from there you can create recurring data job and endpoint . Using endpoint you can send sample xml file to endpoint using postman . Feel free to comment , if you have any questions.