A few of the tags cause new lines to be introduced during display (i.e. rendering by the browser). These are called Block elements or Block tags. Block tags create a block of element on an HTML page. A Paragraph tag is defined by <P> element. A DIV element groups a page into sections. It is normally used by developers to update specific DIV sections through Ajax. These are examples of Block elements.
A few others cause the display in-line. Examples include <span>, and <a> elements. The distinction between Block and Inline type of tags is made to facilitate understanding of how styling elements work and used in CSS.