How to use title elements, paragraphs and forced line breaks correctly_Basic Tutorial

How to use title elements correctly
HTML The title element types are h1, h2, h3, h4, h5 and h6. The numbers represent the structural level of the title. We should take the title seriously as we study in school (haha, but I didn’t read it How many books have I read? 1969 Junior High School-Translator).

The highest level title in the page must be h1. It should describe what the page does. Most pages have an h1 title, but complex page files may have more than one h1 tag.

h2 The title will mark the next structural level, the next level is h3, etc., and you cannot jump from h2 to h4. h4 should not follow h2; there should be h3 between them.

Hn The element type is important to mark the title. Assistive technologies such as screen readers can use an appropriate title to understand the overview of the document. If we use ..., then they can't understand it.

How to use P and BR correctly
The P element marks a paragraph of text. A paragraph consists of one or more sentences.

Forced line breaks (br) are usually just a superficial tool and should be handled by CSS rather than HTML. However, forced line breaks can also be said to be semantic in some places, such as poetry, songs, email addresses, and computer coding demonstrations. These may constitute legitimate uses, but using br to separate paragraphs is definitely incorrect.

On the other hand, P has a very clear semantic meaning: it means paragraph. Sometimes WEB designers use P as an ordinary block-level element, which is obviously incorrect. It is not difficult to see that the label and input tags are included in the P tag in a form. This is absolutely wrong in semantics. The label and input tags do not constitute a "paragraph".