To gauge the success of your link-building efforts, consider employing several key metrics. First and foremost, monitor the increase in organic traffic from search engines. This will help you assess the direct impact of backlinks on the number of site visits you receive. Concurrently, keep an eye on search engine rankings for specific medical keywords, indicating whether your site's visibility and authority are improving. Additionally, it's crucial to analyze the traffic originating from referral sources. By doing this, you can better understand the effectiveness of your link-building campaigns and adjust strategies accordingly.