Every example on Explore shows a number in the corner of the card.
That number is how many times the example has been used to create something. It counts completed generations only, so an example with a high number is one people have actually made something from — not one that's simply been viewed or liked.
A few things worth knowing:
It updates every few minutes rather than instantly, so if you've just used an example, give it a moment to catch up.
It appears on image, video and carousel cards.
Your own gallery doesn't show it — the number is about the example, not about your creations.