/show -all and /show [playername] is a plugin where you can show people in game what item you have. Say you just made a new slimefun machine and wanted to show the server, you could use /show -all to show everyone, I think in the plugin is a timer counting down to the next time you can /show -all as well, so you can't spam the chat lol. I like this plugin because it can also show other players what kind of weapons you have and such! You can change the placeholder of which you want players to use, for example the default placeholder for this plugin is can be [item] and so on. Heres the plugin if you would like to look: https://www.spigotmc.org/resources/chatitem-display-items-in-chat.19064/ BEWARE: there is a SPOILER at the top of the page which shows other servers, not trying to advertise them, just letting you know not to click it lmao.