A hook, as per the dictionary definition, is something that draws you in. In games, a hook can be a number of different things. Often it is something visually exciting, such as beautiful illustrations, amazingly detailed miniatures, realistic resources or some sort of physical component that is integral to gameplay. Hooks can also be an interesting theme, an exciting gameplay mechanism or even the background story behind how a game was made. Certain awards or even the price of a game can be a hook too. Ultimately it's about finding something that grabs your attention and gets you to take a closer look.