A field is a holding location for constant or variable data that has been retrieved by an event listener so it can be passed to and between workflow processes and their components. The field mappings you create define the relationships between the data retrieved and the values that need to be populated to enable workflows to proceed toward completion.
Fields are extremely versatile. The more you begin to take advantage of the power of Process Designer, the more uses you will find for them. A single field can be mapped to several external systems and reused in a variety of contexts.
Once you have mapped the data relationships, Process Manager will be able to populate the associated fields with the corresponding values. With the field mappings in place, you only need to create your workflow processes once, reusing the fields in different situations to support other workflow processes.
For more information, see "Field mapping" and "Field details".