The faucets are special sites that allow you to earn BitCoin or other criptocurrencies (the convertible virtual currency in euros) through completely free operations.
Faucet is derived from the English and this appellation indicates a free and continuous source of Bitcoin.
Some users who are interested in undermining and spreading BitCoin have decided to create these special sites to spread the interest and use of electronic money and thus increase popularity and therefore value.
In practice, faucets are very simple sites where you can enter your bitcoin address and receive small amounts of electronic money completely FREE.
Normally, the system is controlled by a timer, which tells each user when they can apply for their prize at predefined intervals, so that some users do not tap the faucet and get all the Bitcoins made generously available by the webmaster (ranges from minimum ranges from 5 minutes up to 24 hours from one pick to the other).
Lastly, in order to avoid cheerful users developing software that can make automated requests (so without really visiting the Faucet), a CAPTCHA is usually entered to be solved to make the request.