The best way to improve your website’s authority is to get other authoritative websites in your industry to link to your site.
Google looks at the other websites that link back to you as the strongest signal that your website is trustworthy. Google looks at how many backlinks you have and how trustworthy these websites are.
Think quality over quantity here. One link from the New York Times will help your website rankings significantly more than a link from 50 brand new blogs (more on some of our favorite link building techniques here).