You manage marketing for an online clothing company and want to optimise your display campaigns before increasing their budgets. Which of the following actions should you take?

Removing and replacing low-performing assets is the most effective optimization strategy. This allows you to systematically improve campaign performance by eliminating elements that aren't resonating with your audience and introducing new ones that might. Pausing the campaign stops all advertising, preventing any optimization or learning. Adding new assets multiple times per week can lead to instability and make it difficult to isolate the impact of individual changes. Replacing all assets at once is too drastic; it discards any well-performing assets and eliminates the ability to understand what was working and what wasn't.