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

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What is the best possible way to increase overall authority of a site? The most simplest and easiest way.

Homepage or the main landing page gets the most authority, right? How to do that for the entire site?

Yes, the homepage typically gains the most authority. To increase the overall authority of a site, focus on these simple steps:

Quality backlinks: Get links from high-authority, relevant sites.

Internal linking: Distribute authority by linking from the homepage to important pages.

Content quality: Regularly update and add valuable, keyword-optimized content.

Mobile optimization: Ensure the site is mobile-friendly.

Technical SEO: Improve site speed, fix broken links, and use proper on-page SEO tags.