Various companies collect and process data such as IP addresses, device characteristics, browsing data, and user profiles for targeted advertising purposes. Some companies use cookies with varying durations, while others rely on alternative forms of storage. Consent and legitimate interest are key factors in data collection and processing. The data collected also includes non-precise location data, authentication-derived identifiers, probabilistic identifiers, precise location data, and user-provided data. Overall, the focus is on data privacy, consent, and user profiling in digital advertising practices.