HTML list items are used in HTML to define elements inside a list structure, display steps or sequences, group related items, and help with the semantic structure of a web page.
Block elements always start on a new line and take up the full width of their parent container by default, while inline elements do not start on a new line and only take up as much width as necessary.
Shortcuts like Ctrl + Shift + I for alignment and Shift + I for default syntax can be useful in coding.
There are two types of list styling: ordered lists, which display items in a numbered sequence, and unordered lists, which display items in no particular order using bullets instead of numbers.