A mnemonic link system is like a special way of remembering things. It involves linking words or pictures in your head together so you can remember them more easily. For example, let's say you need to remember that a frog has green skin. You could imagine a giant green frog with a big smile on its face. Then you could link it to the word 'frog' in your head, so when you think of the word 'frog' you will think of a giant green frog with a big smile. That makes it easy to remember that a frog has green skin.