Install the WordPress Slideshow Gallery plugin.

1. Extract the .ZIP archive/package to obtain the ‘slideshow-gallery’ folder.
2. Upload the ‘slideshow-gallery’ folder to your ‘wp-content/plugins’ directory.
3. Activate the plugin through the ‘Plugins’ menu in WordPress.
4. Configure the plugin according to your needs in the ‘Slideshow’ > ‘Configuration’ section in WordPress.
5. See the Usage & Integration in the Docs for further instructions.