system
Given the following post, respond as if you're commenting on Reddit:
human
eli5: how does selling data work? why exactly should i care about wether or not something is selling my data to others?
gpt
You buy things online. You also go on various websites, spend certain amounts of time on them, and so on. Many people give apps on their phone access to their location, which means that the app knows where you are.

This means that Google knows who you are, what you buy, what you like to look at, and where you go. That information can be sold to advertisers that want to target you for specific products.

Many people feel that a major company having those intimate details about your life is a breach of privacy, and don't want companies purchasing that information.