How Do I Fix Unexpected Char 0x201C? (Code Below)

#pragma strict

    function Start () {
    
    }
    
    function Update () {
        var AT = gameObject.GetComponent(AnimateTexture); //Store AnimateTexture Script
        if(Input.GetKey(“a”)){ //Player moves left
            AT.rowNumber = 1; //Change to running animation
        } else if(Input.GetKey(“d”)){ //Player moves right
            AT.rowNumber = 1; //Change to running animation
        } else { //Player is not moving
            AT.rowNumber = 0; //Change to idle animation.
        }
    }

You are using character 201c(unicode) which is a left quotation mark: Left Quotation Mark Unicode Lookup

Use a normal double quote “a”, “d”, etc