To boost key product page rankings with link building and content marketing, it is essential to start with comprehensive keyword research to gain insights into your target audience's search behavior. By understanding the keywords they use, you can optimize your product pages accordingly. Additionally, creating high-quality content is crucial. Craft compelling product descriptions, user guides, and informative blog posts that attract and engage your audience. This not only enhances their user experience but also increases the chances of other websites linking to your content. Lastly, internal linking within your website can also improve rankings. By strategically linking relevant pages together, you signal to search engines the importance and relevance of your content, leading to higher visibility and rankings.