ISA stands for Individual Savings Account, and is a government scheme allowing individuals to hold cash, shares and unit trusts free of tax on dividends, interest and capital gains. You can pay into one ISA of each type per tax year, and there is an annual contribution limit of £20,000 across all ISAs you hold per tax year.
At Moneybox, we offer a Cash ISA, a Stocks & Shares ISA, and Lifetime ISAs (both Cash and Stocks & Shares).