https://wccftech.com/google-assistant-android-5-lollipop/

The Google Assistant is Google’s answer to virtual assistants like Siri, Alexa, and Cortana. It has been available on an array of Android devices for quite some time now. However, earlier it was limited to Android phones running Android 6.0 Marshmallow and above. Today, Google tweaked that barrier and made the Assistant available for devices running Android 5.0/5.1 Lollipop.

This step from Google is going to benefit a good chunk of active Android users as the latest Android Distribution chart revealed that around 26.3% devices are still running Lollipop. In addition to making Assistant available for older devices on Lollipop, Google has also started rolling it out for Android tablets running Android 7.0 Nougat and 6.0 Marshmallow.