What do transition words such as “first”, “next”, and “finally” signify in writing?

Transition words like “first,” “next,” and “finally” serve to indicate sequential order in writing. They help organize ideas by guiding the reader through a series of steps or events in a logical, chronological manner. This usage is particularly effective in writing processes, narratives, and instructions, where it's essential for the audience to follow the sequence of thoughts or actions clearly. By utilizing these words, writers can facilitate a smoother flow of information, ensuring that the reader understands the progression and relationship among the points being made.

In contrast, spatial relationships would involve transitions that indicate the arrangement of objects or ideas in relation to one another in space. Causation would pertain to transitions that illustrate cause-and-effect relationships. Comparisons involve transitions that highlight similarities and differences between items or concepts. Thus, while these other types of transitions serve important functions, they don’t specifically address the linear progression of time or steps, which is the primary role of "first," "next," and "finally."