Start in Airtable and create one control record for the campaign before generating any creative. Add fields for campaign name, target audience, buyer problem, offer, approved proof point, landing page, CTA, primary test variable, variables to keep fixed, review owner, and approval status. Write the campaign message as one sentence using this structure: audience, problem, offer, proof, and desired action. Mark the primary test variable as message angle, visual format, offer framing, or proof type so the team knows what the test is actually measuring. Before moving on, have the campaign owner approve the message and reject any version that tries to test multiple audiences, offers, and creative formats at once.