Thelist-style-type property specifies the appearance of a list item element. Because it is the only property that defaults to display:list-item, this is usually a <li> element, but can be any element with this display value.
CSS counters are, in essence, variables maintained by CSS whose values may be incremented by CSS rules to track how many times they're used. This lets you adjust the appearance of content based on its placement in the document. CSS counters are an implementation of Automatic counters and numbering in CSS 2.1.