\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath,amssymb}
\usepackage{graphicx}

\usetheme{Madrid}
\setbeamertemplate{blocks}[rounded][shadow=false]

\title{Presentation Title}
\author{Author Name}
\institute{Institution}
\date{\today}

\begin{document}

\begin{frame}
  \titlepage
\end{frame}

\begin{frame}{Outline}
  \tableofcontents
\end{frame}

\section{Introduction}
\begin{frame}{Introduction}
  Content here.
\end{frame}

\section{Main Content}
\begin{frame}{Main Content}
  Content here.
\end{frame}

\section{Conclusion}
\begin{frame}{Conclusion}
  Content here.
\end{frame}

\end{document}
