I saw that using <hr /> before and after some content sort of lifts the content. Could anybody share what does the tag do and does it come/have antecedent from HTML 4.0 or is a tag done/manufactured by WordPress itself. Example below - some text <hr /><h3>tax which I need to highlight/breakaway <h3><hr />&nbsp;now I know that &nbsp; is for an empty line so that there is some space, while h3 is for headline 3 which makes text stand out a bit, do not get really what <hr /> actually does, can somebody explain? Any links which also explain the above would also be good.
what does the  tag do in wordpress?
html;wordpress;tags
the hr tag is used to insert a horizontal line (aka horizontal rule). Depending on the styling of the hr tag via CSS, it can look many different ways.Reference: http://www.w3schools.com/tags/tag_hr.asp