From within your client center click on Marketing Center
1: Select the review site from first drop down
2: Choose from which badge best match your website
3: Click Generate code
4: Copy the entire code
5: Open html/source code editor on your website where to you want to place the badge. Note: With some CMS systems you may need to add via rich text/snippet option.
Example below of html website editor to add badge code via source code option