Many advertisers use tracking cookies or user-accounts (e.g. being logged into facebook or google while web browsing) to create relevant targeted advertising.
However, what about IP addresses alone? For people that share an IP address (e.g. family home router, or a business), is it possible that they will receive advertising that has been directed to them because of what someone else on that IP has been doing (on a different computer)?
From a technical standpoint, this can be easily done, but
- does it make sense from an advertising point of view?
- Is it a privacy issue if you can guess what other people from your IP address are searching for based on ads you receive?
- Is this something that is already occurs commonly in 2015?