How social media sites helps to improve more visitors...?

a.) Linked-in
Participating Linked-in activities like Creating business profile,creating groups
and networking, managing connections, participating Linked-in Q & A,
adding Linked-in applications events, polls etc updating and sharing business
products and services...

b.)Twitter
sharing and updating business products and services,participating in top
trends, open conversations via mention or reply using @ symbol, private
conversation via direct message,re tweeting, group discussions via # tag,
Twitter advance searches,

c.)Face book
Creating landing page( welcome page) with attractive business
profile, adding and customizing Face book applications, creating
groups and communities, Face book ads promoting, managing friends list,
likes, updating and sharing business products and
services....

d.)Youtube
Creating and uploading videos in YouTube channels with meta title and meta
description.