Installation Location


I am new and sorry if my question sounded dump.

I am installing the community plugin and in the installation instruction the following is mentioned
Place the files in the specified directories
Communities.php - goes in /wp-admin
Communities-framework.php - goes in /wp-content/mu-plugins

I have created the mu-plugins folder but does this mean that I should not upload the plugin to the wp-content/plugins folder as well?

I also need to ask if this plugin can be used in a stand alone wordpress installation not located on a Multy-Site.