Transitional structures are elements in writing that help guide readers from one idea to another. They can be words, phrases, or sentences that clarify relationships between concepts, making the text easier to follow. Common examples include words like "however," "furthermore," and "in addition," which signal shifts in thought or introduce new information. In addition to improving clarity, transitional structures enhance the overall flow of a piece. They can connect paragraphs, sections, or even entire essays, ensuring that the reader understands how different parts relate to each other. Effective use of transitions can significantly improve the coherence of writing.