When it first launched, Google Assistant would save the notes you made to Keep. But the company took this feature away, and then saved your lists inside Assistant itself. But looking for said lists would require some digging. Thankfully, Google is bringing the feature back. You can now set which app your note will be saved in. You can pick Keep, Any.do, AnyList, or Bring. You will need to head into Assistant settings > Services > Notes & Lists, and then select the app of your choice. We hope Google adds more apps down the line. The feature is available in English for all Assistant-enabled devices globally.
Source: Android Police