Search engines like Google, Bing and Yahoo! are the primary means of finding products, services, and websites. If your website doesn’t include SEO best practices you won’t appear on the Search Engine Results Pages (SERP.) for commercially valuable terms.
For example, Google wants to give their users the best results possible and does this by crawling a website, indexing the content, and then Google algorithm decides which pages are shown and in what order. To get the rankings, it’s important to follow best practice SEO techniques.