Text linguistics is a branch of linguistics focused on texts as communication systems, examining texts' structures and functions to better understand cohesion and coherence. It identifies various criteria and criteria of textuality, such as cohesion, coherence, intentionality, and relevance, which guide how texts are interpreted. The document details cohesive devices such as reference, substitution, ellipsis, conjunction, and lexical ties that contribute to the creation of coherent, effective texts.