What is the difference between phrasing content and flow content?

Question

I am new to HTML and CSS and I would like to know the difference between flow content and phrasing content. Other than the W3 official documentation the MDN documentation is

Answer 1

These categories are made when trying to give a semantic meaning to markup in order to best describe the content in it.

Phrasing content defines the text and the mark-up it contains and is a subcategory of the flow-content,
but there are also other subgroups as headers and sections....

Even if it's not very descriptive the documentation gives the exact list of elements which belong to the respective categories.