ISA is an Individual Savings Account. ISA account is similar to a bank deposit, but its profit is completely tax-free. This means that what we will save we will get this. Undoubtedly, it is much more favorable option, rather than the usual deposit, at which 20 % is just picked up. You can open an account in a bank as an ordinary deposit or as a brokerage account. Then, for the sale of shares we will not pay tax. Comparison of the ISA investments should be carried out from time to time to keep in line with the best offers and if it is necessary to change the bank.