It depends. For some businesses, a newsletter is an effective way to share company updates and exclusive information. For others, it may not be the best way to go.
In terms of structure, newsletters usually feature several different pieces of content, such as recent blog posts and current specials. But it’s also perfectly fine to send an email featuring only one piece of content, or an individual marketing message. Tailor your email structure to your unique audience, and see what works best through experimentation.