Difference between :parent and parent() in jQuery

In addition to the pseudo-class :parent, there is also a method parent, which allows you to select the parent of an element.

Let us have the following paragraphs:

html<p>text with <b>b</b> tag</p>
<p>text</p>

Let's, for example, find the parent of the tag b and set it to red:

javascript$('b').parent().css('color', 'red');