Following criteria are important:
* Encouraging clicks is forbidden.
* Prohibited content such as (adult, copyrighted material, illegal contents, etc.)
* Avoid hidden text or hidden links.
* Do not include deceptive or manipulative content or construction to improve your site's search engine ranking.
* Create a useful, information-rich site and write pages that clearly and accurately describe your content.
* Do not place excessive, repetitive or irrelevant keywords in the content or code of webpages.
* You cannot redirect users to unwanted websites, initiate downloads, include malware or contain pop-ups or pop-unders that interfere with site navigation.
* In some locations, including China and India your website's age must be older than 6 months.
I hope it helps
