Google Suicide
How Do You Rank on Google?

Security Check for Malware
your website cannot have viruses or malware!
Mobile Friendly Test
If the website does not display properly on all device sizes, Google will penalize you.
Site Speed
If the site takes more than 2 seconds to load, you begin to lose people.
Code Validation
If the code is throwing errors, it can cause devices to freeze, people to leave, and Google to penalize you.