An ISA, or Individual Savings Account, is a type of savings account available in the United Kingdom that offers tax advantages. Money saved or invested within an ISA is exempt from income tax and capital gains tax, making it an attractive option for individuals looking to grow their savings. There are different types of ISAs, including Cash ISAs and Stocks and Shares ISAs. A Cash ISA allows individuals to save money in a tax-free account, while a Stocks and Shares ISA enables investment in various financial products, such as stocks and bonds, also without tax implications.