I used it for grocery lists until a few months ago when they a) started putting ads in for when I was shopping b) discontinued the web interface which was far more convenient for me.
I literally went back to pen and paper because of this endless closing off and injecting ads garbage.
i know, i know, M$!!1!111!!!! but check out To Do for this and other list making purposes.
shared, synced family grocery list is a must in our household now. yes, items must be added 'manually.' but they can simply be checked/unchecked rather than deleting (which also provides a convenient pantry inventory review just before shopping trips).
That was the killer feature for me. Being able to yell "Alexa, put milk on the list" right as I poured out the last drop was very convenient. For larger lists like recipe ingredients I used the web interface. I still use it via the Windows app (which insists on grouping my items even though I keep turning it off) and my phone, but the experience and interface has gotten worse over time. I wonder if I can get similar functionality from Google.
You definitely can get Google to mark one of your Keep notes as the designated "shopping list" and then add items at the top of it when you ask it to, it works pretty well.
I use AnyList for that. It isn’t very expensive and I can say “Alexa, add milk” and it puts milk on the list in the right category. It’s pretty much the only thing I use my Echo for these days.
I literally went back to pen and paper because of this endless closing off and injecting ads garbage.