Search engine optimization (SEO) is the process of affecting the visibility of a website in unpaid search engine results. SEO helps search engines understand what a page is about and how useful it may be for users. Without SEO, a website can be invisible to search engines. SEO is important because the majority of search engine users choose results on the first page, so ranking highly increases visitors and customers. SEO involves on-page techniques, like optimizing content, meta tags and URLs, and off-page techniques, like backlinks, social sharing and forum posting, to improve a website's visibility.
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