Do we use flash or fill in light to take portraits

When shooting portraits, you can choose to use flash or fill light, depending on the shooting environment and personal technical preferences. Here is a detailed introduction:

Flash. The advantages of flash include high power, high brightness, ability to provide sufficient illumination in low light environments, small size, easy portability, and suitability for shooting moving objects such as people. However, the lighting of the flash is relatively harsh and not suitable for taking portraits. It is also relatively cumbersome to use and requires a flash holder and synchronization cable.
Fill light. The advantages of fill lights are convenient use, soft lighting, suitable for taking portraits, and can be directly placed on a table or clipped onto a camera for use. However, the power of the fill light is relatively low, and the brightness is relatively low. In cases of insufficient light, multiple fill lights may need to be used.
For shooting environments:

In low light environments, fill lights can provide necessary lighting, making shooting easier.
When it is necessary to emphasize a certain part of the picture or add local lighting, flash can be used to enhance brightness.
When shooting on sunny or cloudy days, you can choose to use flash or fill light as needed to adjust the lighting effect.
For shooting techniques and equipment selection:

Some photographers may use off camera flashes to add light to the subject while maintaining the overall brightness of the environment.
For beginners, the fill light may be easier to get started with as it directly illuminates the visible effect.
For photographers with some lighting experience, they may be more inclined to use flash to adjust the direction and intensity of the light.
In summary, the choice between using flash or fill light depends on the shooting environment, personal technical preferences, and the desired shooting effect.