Sections and Paragraphs

A document can be divided into following parts

\section{Section Heading}
\subsection{Sub Section Heading}
\subsubsection{Sub Sub Section Heading}

\paragraph{paragraph}
\subparagraph{sub paragraph}

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Example

\section{Section}
Hello World!
\subsection{Subsection}
Structuring a document is easy!
\subsubsection {Subsubsection}
More text.
\paragraph{paragraph}
Some more text.
\subparagraph{Subparagraph}
Even more text.