It's an old typesetting term that found its way into content management systems. https://archive.nytimes.com/www.nytimes.com/times-insider/2014/11/24/whats-in-a

It's an old typesetting term that found its way into content management systems. https://archive.nytimes.com/www.nytimes.com/times-insider/2014/11/24/whats-in-a-slug/ https://archive.nytimes.com/www.nytimes.com/times-insider/20...