What is the best possible way to increase overall authority of a site?

[deviljinnly]

[*]Earned Links: Focus on acquiring backlinks from reputable and high-authority sites in your industry. This can be achieved through guest blogging, partnerships, and content syndication.
[*]Avoid Spammy Links: Steer clear of low-quality or spammy link-building practices, which can harm your site’s authority.