The client side is also known as the frontend, although these two terms do not mean precisely the same thing. Client-side refers solely to the location where processes run, while frontend refers to the kinds of processes that run client-side.

HTML (Hypertext Markup Language):
HTML, or HyperText Markup Language, is the standard markup language used to create web pages. It’s a combination of Hypertext, which defines the link between web pages, and Markup language, which is used to define the text document within tags to structure web pages. This language is used to annotate text so that machines can understand and manipulate it accordingly. HTML is human-readable and uses tags to define what manipulation has to be done on the text.

CSS (Cascading Style Sheets):
stands for Cascading Style Sheets. It's a stylesheet language used to add layout and visual effects to HTML elements. CSS is used specifically for markup languages, in this case HTML. A markup language is used to apply structure to a website or text document.

JavaScript:
is a scripting or programming language that allows you to implement complex features on web pages — every time a web page does more than just sit there and display static information for you to look at — displaying timely content updates, interactive maps, animated 2D/3D graphics, scrolling video jukeboxes.

Frameworks/Libraries:
Javascript is a set of pre-written code that provides a structure for developing software applications. A library, on the other hand, is a collection of pre-written code that can be used to perform specific tasks. Tools like React, Angular, or Vue.js that simplify front-end development and enhance functionality.

Back-end developers are the experts who build and maintain the mechanisms that process data and perform actions on websites. Unlike front-end developers, who control everything you can see on a website, back-end developers are involved in data storage, security, and other server-side functions that you cannot see.

Server-Side Languages:
Server-side code can be written in any number of programming languages — examples of popular server-side web languages include PHP, Python, Ruby, C#, JavaScript (NodeJS) Java (with Spring), and more.

Databases:
Database plays a critical role in web app development. It is one of the most important aspects of building an application. It is necessary that you have a piece of good knowledge of databases before using them in your application. Database design plays a key role in the operation of your website and provides you with information regarding transactions, data integrity, and security issues. In this article, you will learn the role of databases in web application development. You will also learn about the most popular web app databases and how to connect databases to the web applications.Systems to store and manage data, such as SQL (MySQL, PostgreSQL) and NoSQL (MongoDB).

Server Management:
includes key functions including server provisioning (acquiring, installing, and configuring new servers), setting up components, keeping software and security patches up-to-date, monitoring and managing performance, keeping servers and their applications continuously available to minimize downtime, controlling Knowledge of setting up and managing servers, often using cloud services like AWS, Google Cloud, or Azure.

API (Application Programming Interface):
API is the bridge establishing the connection between them. A simple way to understand how APIs work is to look at a common example—third-party payment processing. When a user purchases a product on an e-commerce site, the site might prompt the user to “Pay with PayPal” or another type of third-party system.Interfaces for the client to communicate with the server, typically RESTful or GraphQL APIs.

Web developers use something called a version control system to track and revise code changes. Git is a code versioning technology that allows them to keep track of the changes they’ve made in code and then go back and review them before making further changes. Many people consider this skill a must-have for full-stack web developers working under tight deadlines.

Web tools can also include software applications that allow users to create and manage content online, such as website builders, content management systems, and graphic design programs. These tools are essential for businesses and individuals looking to establish an online presence or create digital content.