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The "Test Cycles" page provides a progress bar on test execution as it happens in real-time. This progress bar breaks it down by various test executions statuses. All the planned test cycles and the ad hoc cycle provide this information.
Beyond that, Zephyr for JIRA has metrics Metrics gadgets that can be found in the Gadget Gallery and can be added to any JIRA dashboard. Since Zephyr for JIRA uses a standard JIRA issue-type, a wide variety of out-of-the-box JIRA gadgets can be used to track testing.
Finally, template Reports can be found in the left-hand project menu under theĀ Reports section.