Use real products, try several features, return on several different days, and report what worked or failed. Honest feedback is more useful than clicking every control once.
Your checklist stays on this device. It is not sent to Google or BroElectric and is not proof that testing occurred.
Specific beats general
Send useful feedback
A report such as “searching model 2904-22 returned the wrong variant” is actionable. “Looks good” is appreciated, but it does not help verify or improve the app.