If you want to optimize your internal link performance and landing page for PPC campaigns, experimentation is key. Consider changing the position, placement, and design of your internal links to make them more visible and appealing. Additionally, test the number, frequency, and diversity of your internal links to find the optimal balance. You can also alter the anchor text, target page, and context of your internal links to make them more relevant and compelling. Moreover, modifying the offer, value proposition, and call to action of your internal links can make them more aligned and consistent. Finally, consider revamping the landing page content, layout, and structure to make it more compatible with your internal links. Utilize tools like Google Optimize, Unbounce, or VWO to run A/B tests and multivariate tests to compare and measure the results of your changes.