Here I am sharing you, some main factors which are very important for ranking of any website.

1. The content quality of the web page
2. How fresh, in-depth your content is
3. Authority of your domain for the subject
4. Number of quality and relevant backlinks
5. A Secure and Accessible Website
6. Page Speed (Including Mobile Page Speed)
7. Mobile Friendliness
8. Domain Age, URL, and Authority
9. Optimized Content
10. Technical SEO
11. User Experience (RankBrain)
12. Social Signals 
    
13. Real Business Information
14. A Website Optimized for Technical SEO
15. Website Security (HTTPS)
16. On-Page SEO Ranking Factors 
    
17. Brand reputation 
    
18. Links from Trusted Websites