Firstly, to share your solution easily with other professionals but also to promote it across Europe and beyond (showcase your solution, get more visibility, grow your professional network). Secondly, you can build a community around your tool and regularly inform its users (raise awareness, communication and disseminate, expand your knowledge). And thirdly, Joinup serves as a source of inspiration and facilitates collaboration between Public Administrations (improve public services, keep abreast, be innovative).