You may also be interested in R209, a similar report for groups or R502, a report that shows the requirements for selected certifications.
Run R110 to view one user's progress toward any of the certifications they are eligible to earn as well as a summary of the requirements. The report generates a separate table for each certification showing the requirements for each (e.g. required assets, asset types, required grade).
If a selected asset does not have any gradable or completion elements, then the report will show the Required Grade as N/A.
The image below shows an example of R110 where a certification is completed.
The image below shows an example of R110 where a certification has expired. It includes the oroginal date the certification was earned and the date that is expired.
The image below shows an example of R110 where certification requirements have been met, but the user does not have the certification applied to their profile This typically happens if a certification was created after the requirements were met. The Check Eligible Users tool can be used to apply the certification to the user. 
The image below shows an example of R110 where a certification has partial completion. 