6 easy ways to improve the Quality Score of your ads:

1. Create highly specific ad groups

Google suggests about 20 keywords per ad group. The fewer keywords you use per ad group, the more targeted you can design your ads. To get good results, keep your ad groups tightly themed.

For example, if you had an ad group "shoes" that contained keywords such as "brown shoes", "blue shoes" "green shoes", etc. then create new ad groups "brown shoes", "blue shoes" and "green shoes".

Do not use the same keyword in multiple ad groups. If you use the same keyword in multiple ad groups then you will compete with yourself.

2. Include your keywords in your ad text

You should include your keyword in the ad title. It sometimes helps to include it in the ad text as well. If you include the keyword in the URL (www.example.com/keyword) then it's likely that you'll increase the click through rate (CTR).

The click through rate is the most significant component of Google's Quality Score.

3. Include your keywords and the ad text in your landing page

Include the text of the ad and the most important keywords in your different landing pages. It often helps to optimize the landing page for the keywords with the highest click through rate (CTR).

A web page that can get high rankings in the organic search results will also get a high Quality Score for that keyword.

4. Make sure that your landing pages load quickly

The landing page load time affects the Quality Score. The faster your web pages load, the better.

5. Use one landing page per ad group

Your landing pages should be highly related to your ads. This is very important.

A frequent error that AdWords beginners make is routing all ads to the homepage, thus giving away much of their revenue and profit.

The AdWords ad sparks the interest of a potential customer. However, the task of persuading the customer to buy belongs to the landing page. In general, a homepage cannot accomplish this.

Create a separate landing pages for each ad group and keep your ad groups tightly themed. 

6. Test, test and test again

Always test your ads to find the ads with the best click through rates and the best conversions. The better the click through rate, the better the Quality Score.

Source: SEOProfiler.com