The content score by Surfer SEO is nothing, but the value ranges from 0 to 100, which represents how well your content is optimized according to given keywords. Following are the content score given by Surfer SEO. 0 - 33: It represents that the quality of your content is low. 34 - 66: It represents that your content has decent quality and relevancy. 67 - 100: It represents that your content is fully optimized.