Adjustment Layers

What are adjustment layers and why are they vital in motion graphics editing?
GLOSSARY
Adjustment Layers in motion graphics and video editing are overlay layers that allow designers to apply color and effect adjustments to all layers beneath them without permanently altering the original footage or layers. This non-destructive approach facilitates experimentation and adjustments, ensuring maximum flexibility and efficiency in the post-production process.
When color grading a sequence, an adjustment layer can be used to apply a uniform color correction across multiple clips, unifying the look of the scene while retaining the ability to modify each effect as needed.
Technical definition
These layers can be added within video editing and compositing software, offering various adjustments like color balance, brightness/contrast, and filters, which can be toggled on and off or modified without affecting the original footage.