Quality Content: Create original, valuable content for your website.
AdSense Policies: Follow Google's guidelines and policies strictly.
User Experience: Design your site for easy navigation and quick loading.
Essential Pages: Include About, Contact, and Privacy Policy pages.
Domain Ownership: Use your own domain rather than free ones.
Remove Competing Ads: Remove ads from other networks before applying.
Sitemap Submission: Submit your website's sitemap to Google.
Verify Ownership: Verify your website ownership through Google Search Console.
Apply Carefully: Fill out the AdSense application accurately and honestly.
Wait for Review: Google will review your application; this may take time.
Receive Approval: If approved, ads will start displaying on your site.
AdSense eligibility checker : if you want to check website is ready for AdSense or Not Kindly check here -
AdSense eligibility checker