There are a ton of awesome social-sharing apps out there and I'm guessing you've discovered one that you like already, (otherwise you wouldn't have found yourself here, right)? But just in case you're wondering; for my store, I use the social sharing buttons by Zotabox. They are customizable, you can pick and choose which social networks you'd like to have shared and you can also pick what area of your site to have them on.
Anyhow, let's get started, shall we?
Are you with me? Ok...
I tell ya- for quite a long time I had the extra social-sharing buttons on my Shopify Store and they just made it look tacky. Now it looks like it just had a new haircut ;-)
Anyway, let me know how it worked.
And if you have any questions, feel free to ask. But remember- I'm no guru; just an artist trying to make the web a better place...