When is it appropriate to use numbers in a list of items?

Using numbers in a list of items is appropriate when the sequence of items is important. Numbered lists provide a clear way to indicate the order of items, making it easy for the reader to understand the hierarchy or the steps that need to be followed. This is particularly useful in contexts such as instructions, steps in a process, or when prioritizing items where the order of presentation contributes to the overall meaning or functionality.

In scenarios where the sequence does not matter, bullet points or unnumbered lists might be more suitable, as they allow for a more casual presentation of information. Additionally, using numbers for random items can also lead to confusion, as it suggests a definitive order that isn't actually present. The number of items may also influence formatting choices, but it is the significance of the item order that primarily justifies the use of numerical lists.