3827716 - What does the step "Claim was queued for email delivery to XX" in the Audit Trail mean?

Some users have in their Expense reports or Request's Audit Trail  the Action "Email Claim/ Email Request" with Description "Claim/Request was queued for email delivery to xx@xx.com". The reports and requests have different statuses, I cannot identify why this appeared, would you explain what it means and why it appeared there?

A claims' Audit Trail shows the Action "Email Claim" with Description "Claim was queued for email delivery to xx@xx.com", what does it mean and why did it appear there? , KBA , CON-CA-ADM , Administration , CON-EXP-EXP , Expenses , CON-REQ-REQ , Request , Problem