I do not want the section numbered, i.e., Roman number I. (as the following figure show). How can I do this?

I do not want the section numbered, i.e., Roman number I. (as the following figure show). How can I do this?

You can create an unnumbered section using
\section*{Section Title}
Similar starred commands exist for other divisions of the document e.g. \chapter*{} (in books and reports), \subsection*{} etc.
\section*{}?? – cfr May 05 '15 at 02:30