Which ranking signal is most important in SEO?

[warrantyau]

Which ranking signal is most important in SEO?

[jayam]

A Secure and Accessible Website.
Page Speed (Including Mobile Page Speed)
Mobile Friendliness.
Domain Age, URL, and Authority.
Optimized Content.
Technical SEO.
User Experience (RankBrain)
Links.

[Dreamworth]

Backlinks remain one of the strongest ranking signals in Google's ... then this is an important ranking factor, especially for small business SEO.