ESG investment criteria are becoming increasingly important, in some cases becoming mandatory. Thanks to them, potential investors can make investment decisions in companies. Through social networks such as Twitter, these companies can communicate their ESG policies. Not only can the use of Twitter be interpreted as a way to boost corporate social policies, but also as a tool to project a good image. The objective of this paper is to understand the ESG investment criteria impact and trends on the digital public debate, using Twitter data mining. For this purpose, tweets related to ESG from 2019 to 2022 were collected and analyzed. The results indicate a clear upward trend for the term ESG on Twitter. The communities with the greatest presence related to the topic have been detected. The results show the importance of ESG criteria in business and media. Accounts related to energy and natural resources are also present, although to a lesser extent. It has also been detected that most of the communities are decentralized, i.e., they are not limited to disseminating the tweets of a few authors.