Lists are collections of items that can either be ordered (intended to be read in a particular sequence) or unordered. Ordered lists are typically presented as numbered or lettered lists. Ordered lists are used when describing a sequential process, such as steps to follow in a recipe. Ordered lists use numbers, letters, or Roman numerals to identify list items and indicate the list order. Use ordered lists when items need to be read in a specific order to make sense. 

When someone who uses a screen reader comes across an accessible list, the first thing they will hear is something like “list, eight items.” This helps orient them to the fact that they are entering a list, and how long it is. If this information is not available, it may be confusing as to why there is a random string of words like “apple orange banana” in the middle of a content page in Canvas.