An advertiser is managing a Pinterest campaign that sells do-it-yourself (DIY) home improvement tools and wants to reach potential DIY enthusiasts. What should the advertiser do?

Refining audience targeting to focus on users with interests in DIY and home improvement is the most effective strategy. This ensures the ads are shown to individuals who are most likely to be interested in the products, maximizing relevance and potential engagement. Targeting only users who previously clicked on hardware-related pins is too narrow; it misses new potential customers with strong DIY interests who haven't yet interacted with hardware pins. Broadening the audience to everyone on Pinterest is inefficient and wasteful, as many users will have no interest in DIY tools. Increasing ad frequency without refining the audience will annoy irrelevant users and waste budget without improving results.