Now-a-days E-marketing getting more robust then years earlier. Sit in home with social social media link (facebook, twitter or You Tube) You like product just be a fan in Facebook page. Want to show your 1 year cute baby done a brilliant act let know the world with social media, just record in your Mob & publish You tube. You have products just have a website with successful SEO. As a newbie in net Still I am in doubt which is the most strong social media.