Report

This is meant for long form documentation unlike the LaTeX Article Document Class (Private) document class and an example using a chapter argument is below:

\documentclass{report}
\begin{document}
\chapter{this is intersting}
in this chapter i hope to...
\section{section 1}
this is the first section where stuff happens
\section{section 2}

\subsection{sub section 1}
Oi hello world
\subsection{sub section 2}

\subsubsection{sub sub section 1}
tis but a test
\section{this is section 3}

\section{this is section 4}
ending thoughts...
\end{document}