How To Install Minecraft Server Plugins
Plugins are essential for when it comes to building public servers, Plugins work for Spigot,Bukkit and Paper. You can find many different websites that offer you to download plugins, you can find some below this message.
Site 1: Curseforge
Site 2: Bukkit
Site 3: Spigot
Using the Plugin Installer
1 Login to the Kinetic Panel and stop the server.
2 Within the Game Tool category, go to the Plugin Installer.

3 You should now see the page of the Plugin Installer, from there you can Search for a Plugin if you would like, or go down the list.

4 Now, you can click on the Plugin you wish to use & it's version of that plugin.

5 From there, click on the plugins version & click install. The plugin should be installed within your Servers Plugins folder.
6 You can now start your server and the plugin should be installed.
Installing Plugins Manually
1 Login to the Kinetic Panel and stop the server.
2 Head to the File Manager.

3 Find the Plugins folder.

4 From there, you can upload plugins into the Plugins folder & start your server.