Hello,
"ARI Slick Gallery" is a module and it is used as other Joomla! modules. Enable the module, select module position where you want to show the module (module positions are predefined in site template), select pages on what you want to show the module and configure module parameters. Enter path(s) to image folder(s) in "Image path" parameter in module settings. Each parameter contains a tooltip with description.
If you want to embed the module into an article, you can use "Content - Load Module" standard Joomla! plugin. You can read more about it
here.
Regards,
ARI Soft
