Image preview for web sharing in Line chat

I make a website and I try to share it via Line chat. It seems that Line chat has a feature to display web preview like Facebook does. My question is, how to control which image and description that will be shown in Line chat? I know for Facebook but I never know in Line. I have tried googling around but I don't know the keyword for it. The google result is not what I expected.

Thank you for your help.