When a company uses email to promote a product or service, it is known as email marketing. It's a sort of direct marketing in which the corporation connects directly with the customer without the use of a mediator.
When done correctly, email marketing can be a powerful sales tool. When done incorrectly, email marketing might appear as spam, which irritates customers.
The finest marketing emails are mobile-friendly, treat clients with respect, and stick to a regular schedule while varying the content.