Siona needs to make sure her ads are getting a minimum number of impressions on the top of the page. What type of automated bidding strategy is Siona using?

Target impression share is the correct bidding strategy because it directly aims to achieve a specific percentage of impressions at the absolute top of the page, top of the page, or anywhere on the page. Siona's goal of getting a minimum number of impressions on the top of the page aligns perfectly with this strategy. Maximize Clicks focuses on getting as many clicks as possible within a budget, not impression location. Target ROAS (Return On Ad Spend) optimizes for conversion value, while Target CPA (Cost-Per-Acquisition) optimizes for conversions at a specific cost, neither of which directly addresses impression share or ad position.