Students need to connect ideas logically in order to write and speak in more complex and intricate ways. Connecting ideas in a succinct manner greatly contributes to text readability, with cohesion being one of the main qualities that give a written or spoken text unity and purpose.

Cohesion is achieved through the use of linguistic devices, which include: conjunctions, substitutions, connectives and a variety of referring words and lexical devices (such as repetition of words), collocations and lexical groups.