Earned credential (in Completion Insights, Summary of Progress) counts those students who meet all of the following:
Enrolled for the first time during the selected start term
Remained enrolled past the census date of the selected start term.
Match the current filters
Finished a credential sufficient for completion
Typically a credential is a certificate or an Associate's, Bachelor's, or graduate degree. To confirm what specific credentials are counted as completion for your institution, contact Support.