The applications have access to (master) data from external data sources. In addition, entered data can be written to external data sources.
To manage the access to the datasources you have to set up connections.
Data clips are data tables that represent imported datasets directly from a data source or by using the data hub.
These tables are used for visualising data on dashboards and/or for data entry and selection in a form using lists, trees, statuses, etc..
Linking the data clips to the components on dashboards and/or forms is called Mapping. See the separate explanation of this.