The reply all podcast has a nice episode on this, #109. Whether your phone is listening to your conversations. They conclude that ads are shown to people you k

The reply all podcast has a nice episode on this, #109. Whether your phone is listening to your conversations. They conclude that ads are shown to people you know. So you search for a product and then your partner gets ads for this product too, as they know you spend a lot of time together through other tracking methods.