Makeup artists use highlighter to accentuate features and create a radiant complexion by applying it strategically to enhance and define specific areas of the face. Here's how:

1. _Cheekbones_: Apply highlighter to the high points of the cheekbones to create a lifted, defined look.
2. _Cupid's bow_: Highlight the curve of the cupid's bow (the shape of the lips) to make the lips appear fuller and more defined.
3. _Brow bone_: Apply highlighter to the brow bone to create a more defined and lifted brow shape.
4. _Nose_: Highlight the bridge of the nose to create a more defined and slender appearance.
5. _Inner corners of the eyes_: Apply highlighter to the inner corners of the eyes to brighten and open up the eye area.
6. _High points of the face_: Highlight the high points of the face, such as the tops of the cheekbones, nose, and cupid's bow, to create a radiant and youthful complexion.
7. _Collarbone and shoulders_: Apply highlighter to the collarbone and shoulders to create a sun-kissed glow and define the décolletage.
8. _Lip gloss or lip topper_: Apply a highlighter lip gloss or lip topper to add shine and dimension to the lips.

When applying highlighter, makeup artists use various techniques, such as:

- _Subtle layering_: Building up layers of highlighter for a natural-looking glow
- _Targeted application_: Applying highlighter precisely to specific areas for maximum impact
- _Blending_: Blending highlighter into the skin for a seamless finish
- _Mixing with other products_: Mixing highlighter with foundation, moisturizer, or primer for an all-over glow

By strategically applying highlighter, makeup artists can create a radiant, lit-from-within complexion that accentuates the client's best features.