\documentclass[varwidth=true, border=2pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{enumitem}

\begin{document}
    A normal list:
    \begin{itemize}
        \item one
        \item two
        \item three
    \end{itemize}

    Less spearation:
    \begin{itemize}[noitemsep]
        \item one
        \item two
        \item three
    \end{itemize}
\end{document}