Once you have implemented your meta tags for keywords, you need to test and monitor their performance and impact on your SEO and user experience. To do this, you can use a meta tag analyzer tool, such as the one from Moz or SEO Site Checkup, to check if your meta tags are valid, optimized, and compatible with different search engines and platforms. Additionally, you can use a keyword research tool, such as the one from Google or SEMrush, to analyze your keywords and see how they rank, how competitive they are, and how much traffic and conversions they generate. Lastly, you can use a web analytics tool, such as Google Analytics or Matomo, to track and measure your page's performance and user behavior. This will help you to understand how your page ranks, how much traffic and engagement it receives, how long users stay on your page, and what actions they take.