Zero configuration. Simply use shortcode [easy_social_shares]. Read more at Getting Started guide.
Below are some examples usages of showing the facebook & twitter share buttons.
1) Show facebook & twitter share buttons.
[easy_social_shares].
2) Show only Facebook button.
[easy_social_shares social="facebook"].
3) Show only Twitter button.
[easy_social_shares social="twitter"].
4) Show the social share button for other post by post ID.
[easy_social_shares id="143"].