On Page Seo:- On-Page SEO refers to how well your website’s content is presented to search engines. On page, optimization involves ensuring whether a particular webpage is structured in a manner so that it gets found by the search engines for given keywords and key phrases.

Off Page Seo:- Off-Page SEO refers to your website’s overall “authority” on the web determined by what other websites say about your site. Off-page optimization is a long-term process and takes a time to improve. Simply put, off page is all about your online reputation. Off page, optimization includes acquiring backlinks to your page from the authority sites in your niche.

Onpage Optimization. Onpage optimization refers to all measures that can be taken directly within the website in order to improve its position in the search rankings. Examples of this include measures to optimize the content or improve the meta tags.

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).

On Page SEO - Its the process of change the website seo and search engine friendly.

Off Page SEO - Off Page seo is the process of increase the website backlinks.

ON-Page : Optimizing and improving what is on your website pages
OFF-Page : Off page SEO refers to techniques that can be used to improve the position of a website in the search engine results page

OFF-PAGE-directory submission,social bookmarking,press release submission,classified ads-link and non link,blog,forums answers.
ON-PAGE-titles,description,keywords,content optimization,alt tags..

On page Seo is use to make your website 100% search engine friendly

Off page SEO is use to getting top rank in SERP.

On Page SEO refers to settings you can apply on your website so that it is optimized for search engines.
Unlike On- page SEO, Off-page SEO refers to activities you can perform outside the boundaries of your website.