Full Stack Development refers to the development of both the front end (client-side) and the back end (server-side) portion of the web application.
Full Stack Developers have the ability to design both websites and web applications. They work on the frontend, backend, database and debugging of web applications and websites.
Front End is the visible part of the websites and web applications which is responsible for the user experience.
The technology used in the front end is HTML, CSS, and Javascript. Front-end frameworks like AngularJS, React.js, Bootstrap etc .are also used.
The Back End refers to the server-side development of the web application and websites with a primary focus on how websites work.
The back end can be built using languages like PHP, C++, Python, Javascript, Node.js etc.
Databases like SQL and MongoDB are also used in the development of web applications and websites.