A newsletter is typically considered a print source, because it is published in printed form. However, there are newsletters that are published electronically and can be viewed online.
Some newsletters are also available in digital form, which means they can be read on a computer or mobile device.
Because a newsletter is typically published in printed form, it can be used as a source of information for journalists. Journalists may use newsletters to find new sources of information or to research a topic.
A newsletter can also be used as a source of information for consumers. Consumers may use newsletters to find new products or services.