Hello everyone,
How can I rank my website in Google Autocomplete quicky ?

Use the less popular version of a keyword. ...
Use many keyword modifiers. ...
Mix up your on page optimization. ...
Go deeper than the competition is going. ...
Move away from the commercial keywords. ...
Buy traffic.

It's a long story, but here's the long story short -

Write more and more valuable content on a specific niche on a regular basis
Write on low competitive, long-tail keywords
Use an SSL certificate
Use a light theme
Set the single post only in your theme
Optimize the logo and favicon of your site
Use breadcrumbs
Optimize your pages for mobile devices
Improve the CTR, bounce rate and average reading duration of your content
Build some backlinks naturally
You can harness the power of Google+ and YouTube since they're Google's products (who doesn't like his own children!
These are some of the most important factors to rank posts quickly on Google.

The results that you see in Google Autocomplete will be personalized for you. The first two comes from your own search data, followed by the rest that is ranked based on popularity and relevancy.

Click on the slider to set Enable autocomplete to On. It can take up to 2-4 days for autocomplete to start appearing on your search engine. Custom autocompletions​. While Google will suggest autocompletions automatically, you have several options.