an example showing how to merge multiple rows of a column using \multirow

\begin{table}[!h]
\scriptsize
    \centering
\caption{CV Results}
\begin{tabular}{c|c|c|c|c}
\hline
\textbf{Mobility Model} & \textbf{CV} & \textbf{Number of files}  & \textbf{Success}  & \textbf{Success Percentage}   \\
\hline
\multirow{3}{*}{GM}
      & 2 &225 &124 &55\\
      & 4 &117 &68         &58\\
      & 10 &45         &29         &64 \\ \hline
\multirow{3}{*}{RD}
      & 2 &405 &57  &14\\
      & 4 &207 &37         &18\\
      & 10 &90         &13         &14 \\ \hline
\end{tabular}
\label{tab:ResultsTraining}
\end{table}