HTML

• The head element contains information about the webpage.
• The body element represents the visible content shown to the user.
• HTML stands for Hyper Text Markup Language.
• HTML is the standard markup language for creating Web pages.
• HTML describes the structure of a Web page.
• HTML consists of a series of elements.
• HTML elements label pieces of content such as "this is a heading", "this is a paragraph", "this is a link", etc.

CSS

• A margin indicates how much space we want around the outside of an element.
• A padding indicates how much space we want around the content inside an element.
• CSS stands for Cascading Style Sheets.
• CSS describes how HTML elements are to be displayed on screen, paper, or in other media.
• CSS saves a lot of work. It can control the layout of multiple web pages all at once.
• External stylesheets are stored in CSS files.

Git

• git status: checks what branch we are currently on
• git checkout -b branch-name: creates a new branch and switches to it

JavaScript

• A variable is a named container that allows us to store data in our code.
• Control flow is the order in which a computer executes code in a script.
• JavaScript is the programming language of the Web.
• JavaScript is a lightweight, interpreted programming language.
• Designed for creating network-centric applications.