What is a Thriller?

Thrillers are a genre of film which use elements such as suspense, tension and excitement (these are generally the main three used). Thrillers tend to bring out the mood of which the viewer is watching on screen to them, making them feel anxiety, uncertainty, suspense, terror or even excitement. This is what generally grabs the viewer's whole attention. Important information will generally be covered up with fight or chase scenes, these are common uses of thriller sub-genres. Yet every sub-genre in thriller uses/has its own methods and characteristics.