When you clicked on the word hyperlink to get to this page, you were using a hyperlink. The hyperlink can appear as text or graphics. Most hyperlinks take you to another Web page. Other hyperlinks perform special functions, such as sending email, submitting a form, accessing an ftp site, execute a database query, or access a Usenet newsgroup.
Every browser has a function which backs up to the previous page.
Therefore, you can delve into the detail of a hyperlink and later return to the page that refered you there.