is there any other advantage over social network sharing or bookmarking ??? when I submit my listing over there ?
You'll have to be more specific. If you are asking for "other advantages", what are the advantages that you are already aware of?
I means other than real user saw my post n click on it in other Social network, does it bring benefit from Google search, link adavantage and so on ?
Well of course as you are seen my more people and you can be lucky and other people can share your content ad you also get a little boost that helpe you with seo
There is ALWAYS potential benefit in promotion and marketing. If no one sees what you have to offer, you won't gain any new customers or followers.
Social network sharing or bookmarking has many advantages. Bookmarking is used to make presence in the web world and providing the details what kind of product and services your are offering. Social network like facebook, twitter, pinterest and googleplus has huge traffic everyday, so you can easily engage people related to that website.
Sharing or posting something through social media or social bookmarking sites can bring traffic to your website, especially if the ones who clicked your links are your target audience. If your post earns more shares, there is a great possibility that authoritative brand managers and bloggers will include your content on their websites and blogs. This will give you backlinks that can help in improving your SEO campaign.