The best benefit of page rank is it create a impression in user mind when he/she see your site having high PR. Because page rank depends on the basis of quality backlinks or website traffic or quality content on site.
From an SEO viewpoint, pagerank on its own carry very small value. It’s only says you have websites of no exacting subject linking to you. Do best in the SERPs you want backlink from sites that are applicable to the subject matter of the page they are particular linking to.
I have experienced many great things with getting a high PR on Google. One of those is getting good quality traffic for your website plus getting to be on top search results...
Google Page Rank has its own importance. If your site is having good PR , it means it is already listed in Google's good books as all websites want to get ranked on top of the Google so, Google has its own criteria of giving importance to websites.
According to Google, your website have an informative content that's y page rank jumped quickly and this is really good for SEO which helps you too get more back-link for your website.