Plugin not showing on pages

Hi,

I recently installed this plugin and went through and ticked the “Enable” box, selected product, typed in product name, Brand and product ID “asin:1234567890” and then checked the page to see how it looks and it doesn’t show anywhere on the page. I then decided to copy and paste the [WPCR_INSERT] and place it underneath the text and it shows up really small and not readable. Anyone able to help with this issue?

Picture at the below link to show how it looks.

https://www.dropbox.com/s/vf7mxdvw0topy6p/Review%20error.png?dl=0