Google Adsense says “Needs Attention” on my site.

Low value content

Your site doesn’t yet meet the criteria of use in the Google publisher network. For more information, review the following resources:

• Minimum content requirements
• Make sure that your site has unique high quality content and a good user experience
• Webmaster quality guidelines for thin content
• Webmaster quality guidelines

Google-served ads on screens without publisher content

We do not allow Google-served ads on screens:

• without content or with low value content,
• that are under construction,
• that are used for alerts, navigation or other behavioural purposes.

Learn more about Google-served ads on screens without publisher-content.