What are UTM links for emails?

UTM links are special web links used in emails that help us understand how well our email campaigns are working. They're like tracking codes added to the end of a website address. When someone clicks on these links, we can see which email brought them to our website and what specific part of the email was most interesting or effective. They look like normal URL but with special parameters on the end, https://www.example.com?utm_source=newsletter&utm_medium=email&utm_campaign=summer_sale.