Between Tableau users and the data, the Tableau server serves as a go-between. You can upload and share data extracts, save database connections, and reuse calculations and field metadata using Tableau Data Server. This implies that any modifications you make to the data set, computed fields, parameters, aliases, or definitions may be stored and shared with others, providing a safe, centrally controlled environment. You may also use the resources on your server to perform queries on extracts without having to transfer them to your local workstation first.