Slide decks are an assistant tool to a presentation. They are meant to support what a presenter is saying, not too do heavy lifting. With very few exceptions,

Slide decks are an assistant tool to a presentation. They are meant to support what a presenter is saying, not too do heavy lifting. With very few exceptions, a slide deck should not be wholly comprehensible by itself. But too often, people put multiple paragraphs on a slide like they attached the script.