Depending on your company set-up, your expense goes through a specific approval flow and receives different status before reaching your finance department. When the status of your expense is reported, it means it has been included in the accountancy report and a reimbursement can be expected, if it's applicable.
In the activity tab, you can check where your expense is now, its history and who is your approver/controller. You can also find the unique expense ID number there, which can be used to search for an expense quickly for example.
Mobile
1. Select an expense in the Expense page.
2. Navigate to the ACTIVITY tab.
Web
1. Select an expense in the Expense page.
2. On the right pane, choose ACTIVITY.