If statement = if it is true than it will do the thing that you tell it to. if falls then it will do the other thing that you tell it to.
def state = defines a variable
Markdown = a fast text editor
Jupyter = a type of file that allows you to run and write code at the same time.
vscode = an IDE that supports: Python, HTML, Javascript, Markdown, jupyter, and etc.
bash = a unix powered shell created it 1989. Most common shell. Window's powershell is built on bash
zsh = full name: Z shell. created in 1990. macOS uses zsh as default.
github = an internet website used for hosting code.

Warning: there are many more vocab but these are the most common.