What is light eating in photography? As the title says, thank you

Lens eating light: Backlight shooting, especially low-angle backlight shooting at sunset, often brings about strong shadow contrast on the subject, resulting in a large difference in light ratio. There are always a lot of details that cannot be taken into consideration in some parts, and glare will appear in the lens when it is completely backlit. Can disable autofocus. You can effectively use glare to shoot by adjusting the position and angle of the lens. Methods: 1. Metering the bright background without filling in the foreground at all can get a silhouette with strong contrast and a good rendering of the atmosphere. 2. Use a reflector or flash to properly fill in the foreground to get more details. 3. When shooting with backlight, a dazzling outline light can be produced around the object, which strongly outlines the appearance of the object. 4. When shooting flowers, trees and other subjects that are easy to transmit light, you can use backlighting. The illuminated subject will show a stronger texture. 5. When there is severe halo in the lens, pay attention to the composition and adjust the lens position slightly to prevent the flare from covering the subject. 6. When shooting against the light, the accuracy of autofocus will be affected. Manual focus adjustment can be used instead. 7. Install a hood.

Please accept it, thank you!