Serif and sans serif are generic fonts.
If we need to display the text in a specific font,
we have to instead use actual font names
Times New Roman.
However, not all fonts are available on all browsers.
So, we need to specify fallbacks.
We can provide as many fallback
choices as we need separated by commas
The first available font in the
browser gets used.
Since, generic font families are available on all browsers, it’s a smart choice to include one as a fallback. Just remember to make it the last one in the list.