The application scope of spot metering is backlight and large light ratio, right?

Spot metering refers to metering a point, which is usually the center of the whole picture, accounting for about 9% of the whole picture. The advantage of this method is that it can measure the most suitable place in a certain picture according to the photographer's preference, and it is not affected by other factors, especially when the contrast between light and dark in the scene is strong, or the subject can measure the light correctly without interference from other nearby lights. For example, when taking portraits, it is absolutely necessary to measure the face. When taking a photo with a large light ratio (for example, half is in the sky and the other half is in the shadow), it is necessary to measure the part to be exposed correctly.