By default, LaTex tables are very tight:

\usepackage{booktabs}

\begin{table}[]
\centering
\caption{My caption}
\label{my-label}
\begin{tabular}{@{}lll@{}}
\toprule
Rows  & Column 1 & Column 2 \\ \midrule
Row 1 & 1234     & 2345     \\
Row 2 & 3456     & 4567     \\
Row 3 & 5678     & 6789     \\
Row 4 & 7890     & 8901     \\
Row 5 & 9012     & 10000    \\ \bottomrule
\end{tabular}
\end{table}


Screen Shot 2016-04-11 at 11.28.54

Adding this to the document preamble will add space between the rows:

\renewcommand{\arraystretch}{1.7}

Screen Shot 2016-04-11 at 11.24.26

And this command can be used to add space between rows manually:

\vspace{1cm}

Screen Shot 2016-04-11 at 11.25.38