No. But it is more important. You are building relationships. A Website does not do that.
It doesn’t help to increase page rank but improve your authority and you build relationship with your audience.
I think facebook post link is very useful for your site’s page rank. All dofollow post link is very useful for calculation of your page rank.
Sharing your post on facebook might be an good idea for generating amount of traffic but it won’t increase your page rank but improvement in serp can be seen as Google loves Social signals
PageRank can be increase by follow links and from facebook you got nofollow link so it does not affect PageRank. Even it is good to attract targeted visitors.
Yes, Facebook helps you boost your ranking as well as page rank. Facebook is very helpful in spreading information very effectively as well as it helps for an online marketing business.
No, It doesn’t impact on Page Rank because Facebook gives No-follow Links which are not cache by Google.
yes this thing surely helps in improving the page ranking…The number of times the user clicks on the link the better increase in page rank…
For promoting your website you will get help from facebook What you need to do is just create a business page there are post content regularly. Add as many people as you can this will promote your brand. And yes its not necessary to put link every time you post but people talking and commenting on your post and page will help in SERP. Good traffic for your site with good content will help in PR also.
I think nope 
Facebook only is good for traffic .
social and viral signals do impact the site rankings indirectly.
With social shares and comments, the content goes viral. More people come to know about your brand. A small percentage of those would visit your site. That would give you more pageviews, one of the google algorithms for ranking high. Over a period of time more traffic would take you high in SERP and increase page rank.
I have seen traffic increase for my site. Social signals are important parameters. Not just facebook, twitter and pinterest are also great platforms.
hmm I dont think so… To improve page rank you actually need content that contains the keywords related to your site. If people comment on your fb links or talk about it on their walls etc, that can help improve pageranking but just links wont probably do any direct good.
i agree with arstech. the operative words are ‘good traffic with good content’
yes links on Facebook will really going to attract people towards your sites and it will generate traffic which going to help to improve your page rank.
Yes, Facebook will helps you to boost your ranking. Facebook is used by most of the people it will definitely help you to enhance your business.