Take a look at Victoria talking about her son Alex going to university and how she intends to start investing towards that long term goal.
A Stocks and Shares ISA is a longer term investment (5 years+) which provides a tax efficient way for you to invest in the stock market. Providing the potential for greater returns over the longer term, than a savings account or Cash ISA, with a Stocks and Shares ISA you decide how much risk you are prepared to take and you can choose an investment option that matches your risk profile.
With investment comes risk. The value of an investment can go down as well as up and you may not get back the full amount invested. Investments should only be considered for long term goals (5+ goals).