Custom website development is the process of creating a website that is specifically tailored to meet the unique needs and requirements of a particular client or business. Unlike using pre-designed templates or themes, custom website development involves building a website from scratch, providing greater flexibility, control, and the ability to incorporate specific features and functionalities.

Website design is concerned with the visual aspect of the site—how it looks and feels. This includes layout, color schemes, typography, images, and overall visual style.

Web application development is the process of creating application programs that reside on remote servers and are delivered to the user’s device over the internet. These applications can be accessed through a web browser interface, making them accessible from any device with internet connectivity.

A MERN stack development agency is a company that specializes in building web applications using the MERN stack. The MERN stack is a popular JavaScript-based technology stack.

React JS is a popular open-source JavaScript library used for building user interfaces, particularly single-page applications where data can change dynamically over time.

How much you pay depends on several factors, including the size and complexity of your site and the security threats you face. Businesses can pay up to $800 per month for this service but it is usually far less.