CSS Units - When to Use rem, em, px, etc.?

The article discusses various CSS units and when to use each one in web design. CSS units can be broadly classified into two categories: absolute units and relative units. Absolute units, such as `px` (pixels), are used for specifying exact sizes, allowing precise alignment of elements on a page. In contrast, relative units like `em` and `rem` scale according to the font size or parent element, making designs more flexible. The article emphasizes the importance of selecting the appropriate units based on context and project goals, as this impacts the responsiveness and accessibility of websites. It is also worth noting the use of units in different situations, such as `vh` and `vw`, which are used in relation to the viewport's height and width. Lastly, the author encourages experimenting with various units to find those that best suit the style and requirements of individual projects.