The noun 人们 (rénmen) means 'people' in a general sense. The suffix 们 pluralizes 人 (person) to refer to people collectively. It is used when speaking about people in general rather than specific individuals.
人们越来越重视健康饮食。
Rénmen yuèláiyuè zhòngshì jiànkāng yǐnshí.
People are paying more and more attention to healthy eating.
节假日的时候,人们喜欢和家人一起旅行。
Jiéjiàrì de shíhòu, rénmen xǐhuān hé jiārén yìqǐ lǚxíng.
During holidays, people like to travel with their families.
现在人们习惯了用手机支付。
Xiànzài rénmen xíguànle yòng shǒujī zhīfù.
Nowadays people are used to paying with their phones.