Let me try to explain in a little more detail.
Originally Posted by Daniel Browning
This means the bright parts of the image lack detail.
Originally Posted by Daniel Browning
This means to use a faster shutter speed (e.g. 1/1000 instead of 1/500) or something else that will reduce the amount of light falling on the sensor.
Originally Posted by Daniel Browning
ETTR means "Expose To The Right". You can google for more information about this technique, but here's the brief version: Keep increasing exposure until the highlights you care about (brightest parts) are almost, but not quite, clipped. In the first image, the highlights on the face are already clipped, so ETTR would mean reducing exposure. This would result in more noise, but since the image already has such little noise, I think the noise would be preferable to the blown highlights. Shooting in direct sunlight can be difficult in that way, but if your print sizes are small, the noise will not be an issue.
Originally Posted by Daniel Browning
The default tone curve in the camera allows for around ~3 stops of highlight headroom in the green channel. If you reduce exposure without changing the tone curve, it will just make the picture looks too dark. A tone curve with more highlight headroom is one that compresses the highlights. For example, HTP (Highlight Tone Priority) does this through the ISO setting.