What is GDP?
In short
Gross domestic product, or GDP, is the total value of goods and services produced in a country over a period, usually a quarter or a year.
In plain words
It adds up what is made: meals in cafés, new houses, haircuts, factory output, public services, and so on. Imports are taken out, because they were not produced here, and exports count because they were. Statisticians adjust for prices when they want real GDP, so a rise means more was produced, not just that prices went up.
A simple example
Imagine one town in one quarter. Bakers sell bread, a garage fixes cars, the council runs schools, and a workshop ships parts abroad. Add the value of that activity, and avoid counting the same flour twice as it moves from mill to baker. You have a tiny version of GDP. The national figure is that kind of sum for the whole UK.
Why it matters
When GDP grows, there is usually more work and more income to tax. When it shrinks, jobs and wages come under pressure. Governments, the Bank of England, and businesses use it as a broad health check. It is not a full account of life. Unpaid care, leisure, pollution, and how income is shared barely show up.
Easy to mix up
GDP is a flow over a period, not a pile of wealth. A rich country can have a bad quarter. Nominal GDP includes price rises; real GDP does not. GDP per person is fairer for comparing living standards than the raw total, because a larger population produces more. And GDP is not the government's budget.