On-site and off-site SEO are two distinct strategies used to optimize a website's search engine performance. On-site SEO refers to the optimization of the content and structure of an individual website, while off-site SEO is a technique that focuses on improving a website's authority and relevance by creating external links and building relationships with external sites. Both techniques are important components of SEO and need to be combined in order to create effective SEO campaigns. In order to maximize the effectiveness of your SEO campaign, it is essential that you understand the differences between on-site and off-site SEO, so that you can focus your efforts in the right direction.