Improving your quality score can help you lower your bids and increase your return on investment. To do this, you need to focus on the three factors that affect it: expected click-through rate, ad relevance, and landing page experience. For example, to improve your expected click-through rate, you need to use relevant and compelling keywords, headlines, and descriptions that match the user's search query and intent. Additionally, for ad relevance, you should use specific and targeted keywords that reflect what your customers are looking for. Furthermore, for landing page experience, you need to use relevant and original content that matches your ad and offer. Moreover, make sure your landing page is fast, easy to navigate, mobile-friendly, and includes clear calls to action and trust signals. By following these tips, you can optimize each factor and improve your quality score.