Search marketing involves placing _____ on the organic results page of search engines.

Search marketing specifically refers to the strategies employed to enhance visibility in search engine results. In this context, "placing advertisements" is the correct answer because search marketing often relates to paid strategies, such as pay-per-click (PPC) advertising. These advertisements typically appear at the top or bottom of the search engine results page, marked distinctly to differentiate them from organic results.

While images, links, and videos can be part of broader digital marketing strategies, they do not specifically pertain to the core function of search marketing as it is primarily focused on the purchasing of ad space to ensure visibility in search results. Advertisements are a direct result of investment into search engine marketing efforts, aiming to attract potential customers based on relevant search queries.