It's the address of the webpage that you're trying to get.
Domain
The part of the URL which specifies the location of the web server who is going to respond to your request.
IP Address
The IP Address is the actual definitive address of a computer or server on the web.
DNS
Domain Naming System
Maps the human-readable domains to their actual IP address locations.
HTTP
HyperText Transfer Protocol
Protocol used across the web for just about all communication between clients and servers.
HTTP Verbs
POST
GET
PUT
DELETE
HTTPS
POP, IMAP & SMTP
API
Application Programming Interface
Is an exposed part of a web application which lets other applications talk to it.
Web Server
The web server is the part of your web application which actively receives and responds to incoming HTTP requests from browsers or other applications.
Cookies
Little snippets of text that the web application can drop into your browser's memory when it sends back the web page.
SEO
Search Engine Optimization
Is making sure your website is very easy for Google and others to crawl so your customers can find their way there.
DESIGN
WYSIWYG
What You See Is What You Get
It means that however you drag and drop items in the editor, they will show up exactly that way in the "real" world version of the thing you're building.
Responsive Design
Making your website display well regardless of what size screen or type of device it is viewed on. It "responds" to the browser's specifications.
Grid System
RGB, Hex
GUI
Graphic User Interface
Is a generic term for a visual interface where the user can interact with it.
Developers tools
& Code
Front End &
Back End
HTML
Hyper Text Markup Language
The markup language which specifies the structure of all the pieces of a webpage.
CSS
Cascading Style Sheets
Find HTML tags and tell the browser how to display them.
JavaScript
The scripting language used by all browsers.
AJAX
Asynchronous JavaScript And XML
A way of transferring data between the server and web page which doesn't require the user to refresh the page.
Frameworks
A generic term for a bunch of code or markup which makes your life easier by writing all the commonly used things for you.
Version Control
It's like "save" for your code combined with a time machine so you can go back and see exactly who saved what changes when.
Git
Open Source
Exposing your code to the world so they can use it and help make it better. Specifically, you allow other people to do whatever they want with it.