Specific Smooth camera follow tutorial

This might be kinda random but i remember an old project i made and i made the camera follow the player by i think making it a child of an empty object and then attaching the script. i think i remember the script having something like transform.position = transform.position .... somethign something something it was a real simple thing and i wanna use it again. yes i know there are other ways to achieve a smooth camera but i understood this specific way but i cant find the tutorial or post that taught me this way.

does anyone know what im talking about or know the tutorial?