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Bootstrap is a free and open-source collection of tools for creating websites and web applications.
It contains HTML- and CSS-based design templates for typography, forms, buttons, navigation and other interface components,
as well as optional JavaScript extensions. It aims to ease the development of dynamic websites and web applications.
Bootstrap is a front end framework, that is, an interface for the user, unlike the server-side code which resides on the “back end” or server.
Web development is a broad term for the work involved in developing a web site for the Internet (World Wide Web).web development” usually refers to the main non-design aspects of building web sites: writing markup and coding.Most recently Web development has come to mean the creation of content management systems or CMS.For larger organizations and businesses, web development teams can consist of hundreds of people (web developers) and follow standard methods.
Web development may be a collaborative effort between departments rather than the domain of a designated department.
Web design encompasses many different skills and disciplines in the production and maintenance of websites. The different areas of web design include web graphic design,interface design,authoring.
Website builders are tools that allow the construction of websites without manual code editing. They fall into two categories:
1-online proprietary tools provided by web hosting companies.These are typically intended for users to build their private site. Some companies allow the site owner to install alternative tools (commercial or open source) – the more complex of these may also be described as Content Management Systems.
2-software which runs on a computer, creating pages offline and which can then publish these pages on any host.
(These are often considered to be “website design software” rather than “website builders”.)

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