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.
Unlike On- page SEO, off-page SEO refers to activities outside the boundaries of the webpage. The most important are:
Search engines have been trying for decades to find a way to return the best results to the searcher. To do that, they take into account the on-site SEO factors (described above), some other quality factors and off-page SEO.
Off page SEO gives them a very good indication on how the World (other websites and users) perceive the particular website. A web site that is useful is more likely to have references (links) from other websites; it is more likely to have mentions on social media (Facebook likes, tweets, Pins, +1's etc.) and it is more likely to be bookmarked and shared among communities of like-minded users.
Increase in rankings:
If the ranking of the website is higher in the Search Engine Result Pages, site will get additional traffic.
Increase In Page Rank:
rank is a figure between 0 and 10, which point out significance of a website in Google's eye. It is the method made-up by Larry Page, which is the reasons that Google able in screening the mainly appropriate result to the searcher.
Higher rankings in addition meant to better exposure because the reason behind it is if a website ranks in the peak positions: it gets extra links, added visits and additional social media mentions.