Final answer:
Testing and optimizing data throughout a campaign are indeed true and crucial for its success. It involves a continuous cycle of data gathering, testing, and refining strategies, supported by replication to ensure validity.
Step-by-step explanation:
True, you must keep testing and optimizing your data throughout a campaign to see the greatest results. This process is a staple of a robust campaign strategy and is necessary for making informed decisions about the campaign's direction. Testing and optimization help in making sure that the campaign is moving towards achieving its goals. Gather Data to Test Predictions indicates that obtaining relevant data is a vital step which may involve mining literature, making new observations, or conducting formal experiments. Indeed, replication is critical to validate the results of these tests.
It is suggested that if inconsistencies are found when multiple parties obtain substantially different results, it is a sign to examine the accuracy of the data collection process. Furthermore, consistent with the concept of Variation in Samples, it’s recognized that experimentation should be an iterative process. If data does not support a hypothesis, it leads to refinement in the hypothesis or methodologies. Again, this underlines the importance of continuously testing and optimizing data, as mentioned in the direct answer.