Email marketing is the creation and facilitation of marketing campaigns that are sent via email, usually to a group of people. This form of marketing has broad applications and can help businesses acquire new customers, attract repeat customers, and build customer loyalty. Examples of email campaigns include publishing a recurring newsletter, announcing the launch of a new product, or sending birthday greetings to customers. Email marketing services are often used by businesses that want to keep customers engaged via email but lack the expertise or personnel to produce effective content and manage email lists. Generally, email marketing services can outsource either all or part of a business's email marketing efforts. Some services may offer integration with a business's customer relationship management software. Businesses seeking a hands-on approach may choose to facilitate their own email marketing campaigns or supplement outsourced service with email marketing services.