What does the “~” (tilde/squiggle/twiddle) CSS selector mean?

Question

Searching for the ~ character isn\'t easy. I was looking over some CSS and found this

.check:checked ~ .content {
}

What does

Answer 1

Note that in an attribute selector (e.g., [attr~=value]), the tilde

Represents an element with an attribute name of attr whose value is a whitespace-separated list of words, one of which is exactly value.

https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors