Which factor can directly influence click-through rates of Shopping Ads?

Quality of images used in the ads is a crucial factor that can directly influence click-through rates (CTR) of Shopping Ads. High-quality images are essential because they serve as the first point of interaction between the potential customer and the ad. When images are visually appealing, clear, and accurately represent the product, they more effectively capture the attention of consumers as they browse through search results.

In the context of online shopping, potential customers often make quick judgments about a product based on its image. A compelling image can evoke interest and encourage users to click on the ad to learn more. Thus, investing in high-quality visuals is an effective strategy to improve CTR, as it enhances the overall presentation and perceived value of the product being advertised.

Others factors mentioned, such as the length of the ad text, the number of keywords selected, and the type of bidding strategy, while relevant to overall ad performance, do not directly impact how users perceive the ad at first glance or their likelihood to click on it. These elements may contribute to the ad's placement or relevance but won't have the same immediate effect on user attention as the quality of the images does.