flexbox was designed for layout in one dimension - either a row or a column. Grid was designed for two-dimensional layout - rows, and columns at the same time.

Both of them are CSS framework. There is no faster framework than Tailwind when it comes to styling HTML.Bootstrap used for designing responsive websites with a mobile-first approach faster and easier.

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. It consists of: margins, borders, padding, and the actual content.

Semantic HTML refers to syntax that makes the HTML more comprehensible by better defining the different sections and layout of web pages. It makes web pages more informative and adaptable, allowing browsers and search engines to better interpret content.