What must you do in order to use the result after a process node executes?

To utilize the result after a process node executes, it is essential to save the value into a process variable. This action ensures that the outcome of the process can be accessed and used in subsequent nodes within the process. By storing the result in a process variable, it becomes part of the process's context and can be referenced or manipulated in later steps, facilitating workflows and improving efficiency.

The other options, while potentially useful in specific scenarios, do not serve the primary purpose of retaining and utilizing the result from a process node effectively. Logging results can be instrumental for audit trails or analytics, displaying results on a dashboard may enhance user experience, and exporting to CSV is useful for data analysis or reporting purposes, but these actions do not directly align with the immediate need to access and use the result in the process flow itself. Saving the value to a process variable is the foundational step that enables further operations with that result within the Appian environment.