Why do you want to add sharing?
To show users the company has a social presence (Linkedin, Instagram). Most users will discover your presence within the social app in question. It’s not a bad idea to represent your social pages, it’s just handled more elegantly with links on your contact page or footer.
To extend your reach through high-quality content, like your little word baby I’ve named “Phillip” (Tweet this, Pin it). Lots of social shares can give your brand a positive social proof–but be careful; a negative social proof can be devastating.
To boost usership of social networks and grow your base (Facebook Like, Google +1). See #1.
You and your visitors can share your website with their friends group via Facebook, WhatsApp (New), Twitter, Pinterest, Google, LinkedIn, Tumblr, Reddit, and over 100 more sharing and social media sites & apps.
They work while you sleep!