latex figure grid
\documentclass{article}
\usepackage{graphicx}
\usepackage[export]{adjustbox}
\usepackage{duckuments} % just for the example image
\begin{document}
\begin{tabular}{llll}
Label 1 & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck} & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck} & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck}\\
Label 2 & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck} & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck} & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck}\\
Label 3 & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck} & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck} & \includegraphics[width=.2\linewidth,valign=m]{example-image-duck}\\
\end{tabular}
\end{document}