Bootstrap comes with a set of pre-styled responsive, mobile-first components that possess a definite UI kit. Tailwind CSS uses a set of utility classes to create a neat UI with more flexibility and uniqueness. Sites created using Bootstrap follow the generic pattern that makes them look identical.The significant difference between Tailwind CSS and Bootstrap is that Tailwind offers predesigned widgets to build a site from scratch with fast UI development, while Bootstrap comes with a set of pre-styled responsive, mobile-first components that possess a definite UI kit.

In CSS, the term "box model" is used when talking about design and layout. The CSS box model is essentially a box that wraps around every HTML element.The CSS box model is a container that contains multiple properties including borders, margin, padding, and the content itself. It is used to create the design and layout of web pages. It can be used as a toolkit for customizing the layout of different elements. The web browser renders every element as a rectangular box according to the CSS box model.

The HTML semantics refers to the tags that provide meaning to an HTML page rather than just presentation.It makes HTML more comprehensible by better defining the different sections and layout of web pages.A semantic element clearly describes its meaning to both the browser and the developer.By adding semantic tags to your document, you provide additional information about that document, which aids in communication. Specifically, semantic tags make it clear to the browser what the meaning of a page and its content is.