A typical racecard helps you make an informed choice about which horse to bet on.
There will be information about the horse's name, age, and the weight it has to carry in the race.
The rider, trainer and owner's name are listed, plus figures indicating the horse's recent form.
But it can prove baffling to some punters, so BBC Sport Online is providing a clickable guide to the card.
Just click on the area you are interested in on the top half of the card.
What are these?