While Google has become a world standard when searching for just about anything, it was created and exists to make money. One way they do this is by selling all of the information they collect on us to advertisers to help them market better to us as consumers. Keep in mind that everything you do on Google and its other sites is tracked and logged. Some might view this as an invasion of privacy but Google collecting and using this type of information is able to provide customized results, advertisements, and services.
Learn more about how much Google knows about you in the following infographic from DellGines.
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