Sharing your infographic that’s hosted on your website/blog and engaging the social sharing potential is key to maximizing the work you put in to creating your infographics.
Each social network has different image display requirements.
For example, tall infographics do not present well on Facebook. Facebook outlines horizontal images and a ratio of 1200 w x 627 h, meaning you may need to create some sharing images to drive social viewers to the main infographic.
The team at Lemonly put together a great infographic covering keys for social sharing on:
Have a look and bookmark for future reference...