A graveside service can follow a traditional funeral, can precede a memorial service, or can be a stand-alone event. The service will be held at the graveside, or at the crypt where the body or cremated remains will be interred.
The funeral officiant will likely recite prayers or readings, a eulogy may be delivered, and the body will be lowered into the ground or placed in the crypt.
In many cultures it is customary to have guests participate in shovelling dirt into the grave.
You can have music or live singers/musicians if you wish.