Get a Better CTR: Your clickthrough rate has a major impact on your Quality Score, which is why you need to do everything you can to improve it. Getting a higher clickthrough rate should be your whole objective, which is why every step you take should focus on this end, including removing keywords that don't perform well, adding new ones, tweaking the copy of your ad and improving your landing page. The quality of your ads clearly plays a role in improving your clickthrough rate, however it is not known exactly how much importance Google places on CTR. Getting a lot of clicks results in a win-win situation for you because you will not only be paying less for your ads while they remain in top position but you will also be getting a higher level of targeted exposure for your ads. You need to target a CTR that is at least 30% to 40% to increase your Quality Score. Improving your clickthrough rate will take a while but you will be happy you waited because you won't have to do as much work when you have a high Quality Score.
Keep Your Eye on the Landing Page: The landing page is a critical element that can lead to the success of a Google AdWords campaign. A good landing page helps boost conversion rates while helping you save money. How do you do this? When you have a high quality score, your bids go down, which means you end up paying less. It is essential for your landing page and your ads to contain associated content. The content of the landing page should different but substantial so there's nothing missing from it. A higher level of relevancy and quality can be achieved by creating an "About Us" page and connecting it to your landing page. Google sees "Privacy Policies" as essential which is why you should link to one in your landing page.
Make Use of Geo-Targeting: Another way you can increase your clickthrough rate is by personalizing your ads according to location. The performance of different ads is analyzed by Google according to geo-location. So, for example, if you have a high CTR somewhere, then the Quality Score for that zone will also be high. You can consider paying more per click if the conversion ratio is better in that area. You don't really have to raise your bid here, but if you want you could without hurting your campaign.
And that's it! A few simple suggestions that are easy to implement and can help you quickly boost your AdWords Quality Score.