SEO is a discipline in web design that strives to give a website its fair share of opportunity to achieve high rankings in Search Engine Result Pages. Without it, even if a website's content should be highly useful to the intended audience in theory, the indexing procedures that search engines like Google use to record and assess the website may fail to recognize its content for what it is. It is imperative that the website's content be associated with key phrases that are distinct from those that competing websites would have already established themselves to represent. Likewise, it is important for the purpose of SERP rankings that the site has taken every measure to improve its usability by the audience, and it must be easy for readers to move between desired pages.
When Google indexes a website, it deploys programs called crawlers to follow each link on each page and therefore discover other pages. This underscores how important it is for SEO that websites have sitemaps connecting the pages with each other, for Google could feasibly fail to even become aware of certain content pages otherwise. When the website is being launched for the first time, the designer can perform an SEO audit of their own site to estimate how the real crawlers will react when they index it. This is important because it allows websites to put their best foot forward from the start rather than be launched in a less-than-ideal state that the author would have to fix after it has already been published.
On-page SEO audits help the designer adjust the content of the website so that readers do not have to follow too many links to get to a page that might be important. They can help determine whether it takes too long for the site to load its content, whether that content satisfies accessibility standards, and whether the content surrounding the core keywords is in harmony with those terms. Audits can also evaluate how many people among a given page's incoming web traffic end up looking through various related pages and becoming active customers. For more information click here https://www.reddit.com/r/SEO/comments/m3xs43/seoauditchecklist/.