Last year around Christmas time I was talking to my wife about what candy I wanted in my stocking. I said something like, "I really like those gold ball candies. I can't remember their name. Maybe ranchero something?"

Then less than an hour later I had an ad on my phone for ferrero rocher candy. It was incredibly creepy.

I know supposedly the Google phone and Google home (in my case a model from Lenovo) doesn't parse your conversation for ads, but I have no other explanation.