Lexical analysis is a method of language study that involves extracting and analyzing the words associated with a product, service, or population in order to understand their representations and perceptions. It allows for the identification of the diversity and richness of the vocabulary used, as well as the specific lexical field of a community, thus facilitating tailored communication. This technique is particularly effective on sources such as emails, online forums, and social networks, which do not require prior data entry. Lexical analysis is integrated into various website auditing and incoming email management tools, and it complements other analytical methods for a deeper understanding of linguistic interactions.