1. What HTML

HTML (Hypertext Markup Language) - hypertext markup language

Markup language - adding different tags to different text makes the meaning and function of the text different

1. Label - that is, mark,

Tags are the basic structure of HTML. Different tags have different functions

1. Classification of labels

1) In terms of visibility:

Visible labels: P label, a label, IMG label

Invisible Tags: meta tag, type tag, script tag, link tag

2) Tags in head and non head (body tags)

Tags in head: meta, title, style, link, script, base

Body Tags: P, a, B, IMG, table, label, UL, ol, Li, etc., style, link, script, base