A negative prompt for SDXL is like giving it a description of what you don’t want to see in the picture. For example, if you’re asking for a picture of a happy dog, you should use a negative prompt, like “No sad dogs”. Actually, It helps the generator understand what to avoid while creating the image.

To Remove Unwanted Elements: For instance, if there's an unwanted object in an image, you can specify this object as a negative prompt to have it removed from the generated image. Image Modification: Use negative prompts to subtly adjust certain aspects of your image, like facial features or the environment surrounding the subject.