This is the 1604th most frequent Portuguese word.
visual
Relating to sight or vision.
Here, 'visual' is used as a modifier (adjective) to describe the distinctive style related to the visual arts or appearance.
O artista possui um estilo visual único.
The artist has a unique visual style.
In this context, 'visual' qualifies 'communication' (adjective form) referring to information conveyed through images or visual elements.
Ela faz parte de um grupo de comunicação visual.
She is part of a visual communication group.
'Visual' is describing 'system' and relates to the human visual perception system or eyesight in a biological sense.