HTML TAGS are elements that tell the browser how to format the text or graphic element. For the exam remember that tags are not case sensitive . It does not matter to the browser if the TAG is in the upper case or lower case. The important thing is the container tags always in pairs. Every opening container tag should have a corresponding closing container tag.
Some TAGS can have attributes.
Some tags require attributes. All of those tags are container tags. This is a table cell. Tables are also used to format the layout of the elements on the page. The second table does not look like a table at all because you don't see table borders.