What does "lifted blacks" mean? How does it affect your image? How do I do it in Lightroom?
Lifted blacks refers to the action of increasing the brightness of black areas of a raw image. This can have the effect of bringing out details in areas that previously had none, but if the blacks are too deep, it can result in visible noise.
Most raw processors have a Blacks slider, simply adjust it to lift the blacks.
Lifting the blacks means increasing only the dark areas of the image, especially the darkest shadows. You can use it to fill in blocked-up shadows, for example, if your image has enough dynamic range. That means you want to be using raw or HDRI, not JPEG.
The way you do this depends on the raw processor you're using:
If you watch the histogram as you adjust these settings, you want to see the "mountainscape" remain mostly unchanged except at the left edge, which should crowd right. So, if you're using some other raw processor, look for a Blacks or Shadows slider, and play with it with that goal in mind.