What are the most important Google ranking factors?

According to a research which has revealed that there are more than 200 ranking factors that Google use.

However, recently, according to a Search Quality, Senior Strategist at Google itself has revealed about the 3 top ranking signals in the Google's search algorithm and they are

1) Backlinks.
2) Content.
3) Rank Brain.

-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)
-Quality backlinks

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

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.

Structured data is a top SEO ranking factor because it clearly tells search engines what is important about a page. It's also important because structured data can lead to featured snippets in search, which can boost click-through rates and increase rankings even more.

Getting backlinks is one of the most important google ranking factors.

High-quality Content.
Backlinks.
Search Intent and Content Relevancy.
Website Loading Speed.
Mobile Friendliness.
Domain Authority.
Keyword Optimization.
Website Structure.

Google search ranking is mainly based on the content quality of the website, but Google also gives five main factors, including the meaning of user queries, Relevance of content, Quality of content, Usability of webpages, Context and settings.