Drishti is focal point that enhances concentration when you are performing asanas, pranayama and meditation.
The nine points are sky, thumbs, third eye, nose, hand, navel, toes, left, and right.
While some yoga styles have a fixed or “correct” drishti for each pose, I prefer to let myself choose in the moment. For example, in seated forward fold I might use Nose or Toes. Each of these adds a distinct “feel” to the same pose.
Next time you practice, see if you can recognise the focal point of each pose that you do. Note whether it helps you to concentrate and hold the pose more firmly.