Tired backlinks is the one method of building authority links to a relevant page on your website imagine that you have created an SEO optimized page and now you need to create backlinks to it. You need to build these backlinks in a tiered fashion.
Backlinks is a recommendation which we are getting from other website for increasing our website SERP ranking. but now day seo there is only backlink is not important you backlinks should be quality backlinks from high DA or PA.