User blog comment:DEmersonJMFM/Understanding CSS Selectors/@comment-26402117-20160427173215/@comment-5558012-20160427200242

Most of the time I can find the right class (some are more of a pain than others) so I don't need  often. The most times I use it is in regards to headers because finding every single header class is extremely time consuming (you're bound to miss one) and using the declaration in a few cases is much easier.