The noun 组 (zǔ) means "group," "team," or "set." It is used to describe a collection of people or things organized together. For example, 组人员 means "group personnel" or "team members."
我们组一共有八个人。
Wǒmen zǔ yīgòng yǒu bā gè rén.
Our group has a total of eight people.
老师把学生分成了四个组来讨论。
Lǎoshī bǎ xuéshēng fēnchéng le sì gè zǔ lái tǎolùn.
The teacher divided the students into four groups for discussion.
第三组的方案得到了大家的认可。
Dì sān zǔ de fāng'àn dédào le dàjiā de rènkě.
The third group's proposal was approved by everyone.