This dataset can be found on Kaggle, Huggingface and many other websites, but the source is from the research paper [Tiago], whose authors contributed it to
the Machine Learning repository at [UCI]. It contains 5,574 SMS messages, of which 747 massages are labeled as spam.
By nature, the messages are short and, in some cases, quite cryptic and personal.
The CSV file is a straightforward representation of the data.
References
[UCI]
https://archive.ics.uci.edu/dataset/228/sms+spam+collection… See the full description on the dataset page:
https://huggingface.co/datasets/bvk/SMS-spam.