

If you are into that could be interesting to learn about metadata, e.g EXIF data, and how anything can be used for fingerprinting. What’s interesting IMHO is to pragmatically know how valuable a specific piece of data or metadata is useful for fingerprinting, namely how identifying it truly is. For example knowing if a file comes from Android or iOS is too generic to be useful whereas timestamp with geolocation data segments the potential space a lot more.
A good example to “play” with could be https://coveryourtracks.eff.org/ which does highlight the idea of “bits of identifying information” namely :
“A “bit” is a basic unit of information for computers. The bit represents a logical state with one of two possible values, often represented as “1” or “0”, for example. In your results from Cover Your Tracks, some metrics may be listed as “1” or “0”, or “true” or “false”, indicating whether a setting is enabled or disabled. While each individual metric’s details may seem like a small amount of information, when combined with your browser’s other metrics, they can uniquely identify your browser. Your results are measured in “bits of identifying information,” which is a combined summary of all these metrics.”
Point being, not all behaviors, conscious or not, explicit or not, lead to the same amount of bits. Some are VERY valuable, others are basically pointless. Knowing the difference means not spending a lot of energy fighting without making a difference.