| page jumps | See anchor links. |
| topic efficiency | This metric (found in Topic Research) represents the ratio between a topics search volume and difficulty. A higher Topic Efficiency score is generally the result of higher volume and lower difficulty. High Topic Efficiency can represent a good topic to target with content marketing efforts. |
| google mobile first indexing | 2017 will see Google experiment with preferring mobile versions of websites when it comes to indexing and ranking. Thus a poorly configured mobile site might negatively impact your search engine standing. |
| social signal | Any factors that demonstrate authority and influence on popular social networking websites. For example, the social authority of a user on Twitter. |
| link atrophy | the loss of backlinks to your website over time. |
