Hello there, I want to move my player according to my camera, rather than the axis. Please someone help me.

When my camera rotates with +ve value with respect to y axis, and I press UpArrow, my player moves to the left side.
I want to move my player according to my camera, not according to axis.

You can rotate the player to face the same direction as the camera, then use:

 transform.position  += transform.forward * speed;

to move the player relative to its rotation.