What is the server icon(top)The server icon is a small .png image that is shown next to the server if a user adds the server to their server list.
The server icon may also be downloaded by "Minecraft server list" websites that use it as a picture for the server.
Using a server icon helps users to easily recognize the server when scrolling through their server list.
Installation(top)Open an image maker/editor of your choice, and create an icon that is 64x64 pixels. Export it in the PNG format.
The file must be called server-icon.png in order to be recognized by the server
Place the server-icon.png in the server's root directory (the same folder as the Spigot or Bungeecord .jar file, or the working directory of your server if it is changed).
You must restart the server after you place the file in the folder in order for the server to load it.