Gravitational field strength
The gravitational field strength of the Earth is 10 N/kg (ten newtons per kilogram). This means that an object with a mass of 1 kg would be attracted towards the centre of the Earth by a force of 10 N. We feel forces like this as weight.
You would weigh less on the Moon than you do on Earth because the gravitational field strength of the Moon is one-sixth that of the Earth. But note that your mass would stay the same.
Learn more here.