What should I place in the code to connect my html 5 website to Facebook, Google+ etc...?

[Ophelia619]

I know most people use a CMS these days but I created a html 5 website for my small business using Dreamweaver.  I'd like to know what, if anything, I should place in the code to link my website with my social media accounts like Facebook, Google+, Twitter, and Pinterest?  I've found information about plugins that are useful if you're using a CMS but I'm not.  I placed social media buttons on all of the pages of my website already, and when you click on those buttons they go to my social media accounts.  But is there anything that should be placed in the code?

Thanks for your help

[FCBM]

Here's a necessary step to take to get a verified check mark next to your website URL on Google Plus. This is especially important if you're a local business.

https://support.google.com/business/answer/4569085?hl=en