Thank you very much for your everybody and explanation.
But English isn’t understood so much, so I don’t understand the contents you’re answering well.
I question again.
Since sticking to a summary card, a summary card which is a big image, a picture card, a gallery card and a product card, I understand.
Because a source of my page doesn’t open.
Basic , if it’s written, which place doesn’t know whether it’s good?
Can html of my page think where to operate?
My Twitterpage is https://twitter.com/sato0127.
Somehow, I’m waiting for a response.