EditorUtility. The role and application of setdirty in untiy

UnityEditor.EditorUtility.SetDirty(this.gameObject);
Combine some Unity The script changes the Inspector Then change some properties on
Direct change Unity Function of prefabricated body , Used to change Inspector Save the data on

My code is attached below

    [ContextMenu(" Automatically assign null to my original image ")]
    public void ClearPictureOrSpriteOrigionName()
    {
    
        string myname = null;

        if (this.GetComponent<Image>() != null || this.GetComponent<SpriteRenderer>() != null)
        {
    
            if (this.GetComponent<Image>() != null)
            {
    
                myname = this.GetComponent<Image>().sprite.name;
            }
            else if (this.GetComponent<SpriteRenderer>() != null)
            {
    
                myname = this.GetComponent<SpriteRenderer>().sprite.name;
            }
        }

        if (myname != null)
        {
    
            if (this.GetComponent<Image>() != null)
            {
    
                this.GetComponent<Image>().sprite = null;
            }
            else if (this.GetComponent<SpriteRenderer>() != null)
            {
    
                this.GetComponent<SpriteRenderer>().sprite = null;
            }
          
                UnityEditor.EditorUtility.SetDirty(this.gameObject);

                Debug.Log(" Save some data ");
           
        }
  
    }