Which trigger is considered the preferred trigger for "set field" actions?

The preferred trigger for "set field" actions is "before record load." This is primarily because utilizing this trigger allows developers to modify the record's fields before the user sees it, ensuring that users are presented with the most relevant and accurate information as soon as they access the record.

When "before record load" is used, you can set field values based on certain conditions, calculations, or business logic that needs to be applied beforehand. It enhances the user experience by ensuring that relevant data is at the forefront and that any necessary defaults or modifications are in effect right before the record is displayed. This trigger is particularly powerful in preventing users from mistakenly interacting with outdated or irrelevant data, effectively streamlining the workflow.

Other options like "before user edit" and "during user interaction" relate to actions that occur after the record is loaded or while a user is actively changing the record. These may not provide the same level of control for setting initial field values, which is especially critical for ensuring that users start with the correct context and information. "Before state entry," while related to transitions between states in a workflow, does not specifically focus on setting field values on record loading, making it less suited for such actions.