Inspector Attributes

Attributes on a field change how the Inspector shows it, without changing what the code does. Four come up in almost every Unity project:

• [Header("Movement")] puts a bold title above the fields that follow, to group them.
• [Tooltip("Units per second")] shows that text when the mouse rests on the field's name.
• [Range(0f, 10f)] draws a slider, and the Inspector keeps the value between 0 and 10.
• [HideInInspector] hides a public field from the Inspector, while other scripts can still use it.

[Header("Movement")]
[Tooltip("Units per second")]
[Range(0f, 10f)]
[SerializeField] private float speed = 4f;

[HideInInspector] public int score;

[Range] only limits what can be typed or dragged in the Inspector. Code can still set speed = 25f, and nothing stops it, so a script that needs a limit enforces it in code too.