If I were you, I would focus on a few key areas to try to improve your conversion rate:
Make sure your ads are highly relevant to your target audience. Use keywords that are closely related to your product, and make sure your ads are clear and easy to understand.
Make sure your landing page is highly relevant to your ads. If your ads are about a specific product, make sure your landing page is about that same product. Don’t send people to your homepage.
Make sure your website is easy to use and navigate.