How can customer satisfaction be reviewed least at list four examples?

Customer satisfaction can be reviewed through various methods, including surveys, which gather direct feedback on customer experiences; online reviews and ratings on platforms like google or Yelp, which reflect public sentiment; social media monitoring, where brands can gauge customer reactions and comments; and net promoter scores (NPS), which measure customer loyalty by asking how likely they are to recommend a product or service. Each of these methods provides valuable insights into customer perceptions and areas for improvement.