Function of this button to directly input images in your blog to your Pinterest account. How it works from the Button share Pin It this is the button will appear when you focus the cursor on each image in the blog.
Easy Way of Adding Pin It Buttons in Images
Before adding this code make sure that in your blog template you have added jquery library link
<script async='' data-pin-color='white' data-pin-hover='true' src='//assets.pinterest.com/js/pinit.js'/>
Here is a display demo of this Pin It button. DEMO