What does the ID in this line mean?

Question

PHP

Hello, I analyzed the script, where this line of code is present:
$teams_stored_meta = get_post_meta($post->ID);
What does this sign mean ->
And also, what does ID mean?

Answer 1

Contains $posta reference to some object . - the ID
$post->ID property of this very object.

Answer 2

The -> sign is used to refer to the fields and methods of an object.
ID - field name.