The quality score determines the CPC. How can we improve the quality score of Google AdWords? I personally made a summary as follows:
Website content:
1. 10-15 pages of separate content, each page must have privacy policy, About Us/Contact and other links.
2. Each page must have a sitemap connection.
3. Each page must have a very reliable website link. For example: Wikipedia wikipedia.org
4. It is best to establish a small blog and update it regularly every week.
5. Advertising content, LP content, and overall website content are closely linked.
LP page:
1. Put text information under the picture.
2. Put keywords in the meta tag, between 50-150.
3. Textual information and keywords are closely related.
Source: http://www.feiku-sodu.cn