Yet another basic web design interview question that discusses grouping in CSS3. Code can be shortened, and websites can load more quickly by grouping similar elements together. It's an approach to making our code easier to understand and use. We may go more granular in our programming with the assistance of grouping. When used, the grouping selector will pick all of the HTML components that have similar style specifications. To reduce the amount of code, it is recommended that the selectors be grouped together. A comma may be used to break selections into groups.  Grouping example: #grouped g, ul { padding-top: 40px; margin: 1; }