Companies often promote their products on social media.

promote 是动词，意思是"推广、促销、提升"。这个词由前缀 pro-（表示"向前"）和词根 mote（来自拉丁语 movere，意为"移动"）组成，字面意思是"向前推动"，引申为"促进、提升、宣传推广"的意思。