https://www.reliablesoft.net/what-is-off-page-seo/
Off page SEO refers to techniques that can be used to improve the position of a web site in the search engine results page (SERPs). Many people associate off-page SEO with link building but it is not only that. In general, off Page SEO has to do with promotion methods – beyond website design –for the purpose of ranking a website higher in the search results.
https://moz.com/ugc/21offpage-seo-strategies-to-build-your-online-reputation
Try these Advanced Off-Page SEO Strategies to market your website, get ranked in search engines, and to build online reputation (branding) for your company/website so that you can survive in this competitive SEO world.
https://econsultancy.com/blog/65137-what-is-off-page-seo-and-how-can-you-use-it/
Off-page SEO ….refers to the methods that you can use to raise the ranking of a website through promotional means, outside of the actual code or design of the site itself.