To begin filtering a device using the Hub go to your SecurlyHome app and navigate to Manage Devices. The device you want to filter will be displayed in there. Click + to add it to the Filtered Devices list. Once added, your device will be filtered.
To verify if filtering is working for the device browse 'unsafewebsite.com' from the device you want to filter. The website should appear blocked. This means that filtering is working as expected. Note that unsafewebsite.com is a Securly owned domain used only for Hub verification purposes and does not contain any harmful content.