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The COSTS are that  your personal data: your age, gender, your address, but also more personal information that can be taken and used to customize you  or market to you

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SMALL FOOTPRINTS are, for example, a Skype call, a Facebook post, an e-mail to a hotmail user, an uploaded picture or simply a "like". Every time you visit a web site, you reveal some information about yourself to the owner of the web site: your IP address, which may include your geographic location, your web browser type and operating system, and, often, the last web site you visited.They know where you are, what you are searching and also the last websites you visited. These footprints, however, are pretty light ones.

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BIG FOOTPRINTS
Internet servicies like online commerce, social networks and web email require the websites to be able to do multiple interactions, such as putting a book in a shopping cart and then paying for it. In order to do that they need to recognise you and your IP address can change everytime you visit a site...they need

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We leave them:

1. Visiting websites

2. Doing shopping online

3. Leaving comments on Social Media

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Digital Footprints are the RECORD and the TRACES we leave behind as we use the Internet. It's NOT possible to have ZERO FOOTPRINTS!
Anything you place online, whether text or images, has the potential to be available online forever.”

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THE BENEFITS are that you don't have to repeatedly log in to submit personal details to websites.