What are highlights in hair?

The highlights in hair is like the everry end of a cartoon

Hair highlights are strands of hair in a different colour, lighter or darker. You can have 1, 2 or more shades of highlights in your hair to add definition and dimension to your hair. Or you can even follow some trends, such as rainbow hair and you can have even 4 or 5 different highlights colour. It really depends on what you want.