Amy has created a new brand for her company's goldfish training materials. She knows that other companies train goldfish and it is a popular sport, but realizes that it is a niche market. She wants to use a Google Display Ads campaign to build awareness for her new brand. Which Google Display ad targeting option can help Amy with her goal of creating awareness within her niche market?

Custom Affinity audiences is the correct choice because it allows Amy to define her own highly specific audience by using keywords, URLs, and apps as inputs, which is essential for a niche market like goldfish training. Unlike broad Affinity audiences that target massive, pre-defined interest groups (such as "Pet Lovers"), Custom Affinity gives Amy the precision to build a "top-of-funnel" awareness segment tailored exactly to the unique interests of her potential customers. This ensures her brand-building efforts are concentrated on a relevant audience that is most likely to care about her specialized materials, providing the perfect balance between the scale of a Display campaign and the specificity of a niche sport.