Usually it provides an atachment site for muscles or ligaments.
Any bony prominence is named by "process". E.g. "mastoid process of the skull."
The xyphoid process is the inferior sternal bony landmark.
Gomphosis
Process
The mastoid process is the bony bump behind the ears.
The olecranon process of the ulna is what you feel as the bony poiny of the elbow.
Styloid processStyloid Process
styloid process is the bony protuberance just behind your ear
A process is the bony landmark defined as a smooth, rounded knob.
Olecranon process
styloid
Olecranon process