Whenever you surf the Web, you leave yourself open to being snooped upon by Web sites. They can track your online travels, know what operating system and browser you’re running, find out your machine name, uncover the last sites you’ve visited, examine your history list, delve into your cache, examine your IP address and use that to learn basic information about you such as your geographic location and more. To a great extent, your Internet life is an open book when you visit.
Sites use a variety of techniques to gather and collate this information, but the two most basic are examining your IP address and placing cookies on your PC. Matching your IP address with your cookies makes it easier for them to create personal profiles.
If you’d like to see what kind of information sites can gather about you, head to these two sites, which peer into your browser and report what they find.