The document provides an overview of search engine optimization (SEO). It defines SEO as improving a website's visibility in organic search results. The document outlines the main SEO techniques including on-page optimization of content, titles, and metadata, and off-page factors like links and social signals. It also explains the two main types of SEO - organic which doesn't require payment but takes longer, and paid SEO which can show results faster but requires payment to search engines. The goal of SEO is to understand how search engine algorithms work and optimize websites accordingly to increase traffic from search engines.
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