How can I secure my smart home devices from being hacked?

Update your device's system software and hardware to the newest version available.
Make sure your devices have secure passwords.

Check the device's privacy settings to make sure it is giving out the minimal amount of data for it to work properly.
Only add devices to your network that you trust.
Change the default names of your Wifi networks, passwords, and security codes.

Carefully read the terms of service and privacy policies before connecting any devices to the network.