ICO is the abbreviation of Initial Coin Offering. It means that someone offers investors some units of a new cryptocurrency or crypto-token in exchange against cryptocurrencies like Bitcoin or Ethereum. Since 2013 ICOs are often used to fund the development of new cryptocurrencies. The pre-created token can be easily sold and traded on all cryptocurrency exchanges if there is demand for them.
With the success of Ethereum ICO are more and more used to fund the development of a crypto project by releasing token which is somehow integrated into the project. With this turn, ICO has become a tool that could revolutionize not just currency but the whole financial system. ICO token could become the securities and shares of tomorrow.