Final answer:
Hiroko can analyze campaign reach, exclude previous visitors, and increase bid adjustments for users on her remarketing lists after layering her Search campaigns.
Step-by-step explanation:
Once Hiroko has layered her Search campaigns with her remarketing lists, she is able to take a few actions to optimize her campaign performance. First, she can analyze the campaign's reach to understand which parts of her audience she is effectively engaging. Additionally, she has the option to exclude previous visitors from her campaign if her goal is to attract new users, thereby not wasting ad spends on users who are already aware of her product or website. Apart from these options, Hiroko can also increase bid adjustments for users on her remarketing list to improve their chances of seeing her ads, as these users have previously shown interest in her products or website.