The best way to define a person's face is through a bokeh. Being able to make the people you love pop out in the foreground is the best thing ever!
Bokeh is a word used in photography when we refer to a blur of high quality. The origin of the word bokeh is from Japanese ぼけ (bo・ke), which means blur or blurring.
That is why the bokeh is the solution when thousand of things or a thousand people go around and we want to focus in our subject. Handling the aperture is important, usually you should use a big aperture lenses and just a little depth of field.
The bokeh portrait could result in beautiful expressions. The bokeh could show the world who are the people in your life. Erasing the surroundings to focus on only one person makes the picture more like a feeling, an expression.