That depends. When Google Assistant was Google Now it had a shopping list that was separated from Keep. Then there was a lot of confusion about which app to use when Assistant came out and replaced Google Now. So Google went ahead and made it so you could choose between the shopping List or Google Now. Then they sunsetted the shopping list app I believe (might be wrong there). Then they made it so you could choose between Keep and Tasks. If you were like me and made Keep the default you probably still have Keep as the default.