If you're new to web development, you may have heard these two CSS frameworks being name-dropped. TailwindCSS, in particular, has caught on recently, but you'd likely have also heard about the venerable Bootstrap. What should you pick?
Both take different approaches:
Bootstrap is what I'd call a Component-based Framework. t's designed to help developers quickly bootstrap a typical website or app and so comes with a set of pre-made components, along with some utilities for spacing etc. Other similar frameworks include Bulma and Foundation.
TailwindCSS is a Utility-first Framework. In contrast to Bootstrap, which provides a few utilities, Tailwind is all utilities. The core framework has no pre-made components, so you'll need to build your own.

CSS box model
The components that can be depicted on the web page consist of one or more than one rectangular box.
A CSS box model is a compartment that includes numerous assets, such as edge, border, padding and material. It is used to develop the design and structure of a web page. It can be used as a set of tools to personalize the layout of different components. According to the CSS box model, the web browser supplies each element as a square prism.
The following diagram illustrates how the CSS properties of width, height, padding, border and margin dictate that how much space an attribute will occupy on a web page.

semantic tags The core characteristic of a semantic element is that it clearly communicated its meaning to both the developer and the browser. These elements clearly define its content.