Partial highlights generally are designed to call attention to particular feature or to accent your style. It’s bolder and a little more visible, because the purpose is to call attention to your coloring choice, not to blend in and add natural depth to it. When you see someone with purposeful streaks of color in their hair, that is partial highlighting.
Highlights can flatter your skin tone, provide a subtle change in your look, call attention to a sassy new hairdo, or even cover up pesky gray hairs. You may like your natural hair color generally, but desire a small shift here and there. Highlights are perfect for you! There is no one reason to get highlights in your hair, but it is a great thing to consider when you want to change your look without a lot of time and effort.
More information on tips in choosing highlights on these articles: Starting Hair Highlights and Choosing the Right Hair Color