During the yoga class, your yoga teacher will often remind you to stare at your drishti, and to breathe mindfully looking at it.
Nothing is left to random in an Asana, the gaze also has a direction to look at, staring at a drishti develops concentration and adjusts the posture correctly.
In the triangle pose, looking at the thumb of the hand stretched toward the sky, is your drishti, in downward facing dog, your ashtanga teacher will ask you to look at your navel, and eyes closed in meditation your drishti can be the third eye or the heart chakra.
The awareness of the senses is at the service of our evolution. I noticed that sometimes, beginner students, distracted by the environment or thinking about something else, have their eyes going in all directions. To place the gaze to a point for a few breaths helps the mind to concentrate.
Hearing is also engaged on listening to the regularity of the breathing. It is also easier to count the breath when the teacher asks students to stay 5 breaths for example. This is another way to anchor the mind in the present moment.
In your daily life, it will helps you reaching your goals, they will become your drishtis. Regular practice of yoga has subtle effects on the life of the practitioner, this is why the practice is so fascinating!