Off-page SEO refers to actions taken outside of your own website to impact your rankings within search engine results pages (SERPs). Along with on-page SEO, these include several of the factors of basic SEO that help a site to rank. There are two types of off-page SEO: backlink building and off-site SEO. Backlink building is a popular SEO technique that involves posting links on other sites that are relevant to your industry and to your site. Off-site SEO is a type of link building that is focused on building links on other websites that are relevant to your industry and to your site.