you can click this website- https://www.addthis.com then log in to your Facebook Id or google Id. After logging chose where you want to plugging share button blog or WordPress, then opened a dashboard front of you there have- Share button, Follow button, related post, Link building, Link promotion, Website tip jar etc. you can set up easily step by step and this website count by analytic button to your blog/website- Total visitors, Shares, Follows, Related posts, Conversions.
As an example, this site shows you where you should place the code on your website/blog. For example-
In a blog shares button on the left side:-
1st step--Here's your unique Code snippet. Click this code to copy it right to your clipboard.
... 2nd step paste.
Paste the above code right above the closing</body> of the HTML in your website on every page you want AddThis to work.