HTML

Hyper Text Markup Language

HyperText means that it uses the HTTP part of the Internet
Markup means the code you write is annotated with keywords
Language means it can be read by both a human and a computer

HTML have mainly two (02) types of elements:

Block element
Inline element

Block elements are meant to structure the main parts of your page, by dividing your content incoherent blocks.

Inline elements are meant to differentiate part of a text, to give it a particular function or meaning. Inline elements usually comprise a single or few words.

Block Elements

paragraphs <p>
lists: unordered (with bullet points) <ul> or ordered lists (with numbers) <ol>
headings: from 1st level <h1> to 6th level headings <h6>
articles <article>
sections <section>
long quotes <blockquote>

Inline Elements

links <a>
emphasized words <em>
important words <strong>
short quotes <q>
abbreviations <abbr>