Natural Language Understanding (NLU) focuses on computer reading comprehension. Also referred to as Natural Language Interpretation (NLI.)
Where is all of this used in Marketing?
Voice assistants, chatbots, spam filters, related words on search engines, spell check and grammar software, translation tools, knowledge bases, predictive text and autocomplete, social media monitoring, analytics, and anywhere machines need to break down and analyze/interpret human language.
A Down-and-Dirty Definition for Marketers. (Read more about these here.)