A newsletter is a regularly distributed publication generally about one main topic that is of interest to its subscribers.

Copywriting is the use of words and ideas to promote a person, business, opinion or idea. wikipedia.org

A cover letter, covering letter, motivation letter, motivational letter or a letter of motivation is a letter of introduction attached to, or accompanying another document such as a r_sum_ or curriculum vitae.

Content creation is the contribution of information to any media and most especially to digital media for an end-user/audience in specific contexts. wikipedia.org

Public relations (PR) is the practice of managing the flow of information between an organization and its publics. Public relations provides an organization or individual exposure to their audiences using topics of public interest and news items that do not require direct payment. wikipedia.org

Web content is the textual, visual or aural content that is encountered as part of the user experience on websites. It may include, among other things: text, images, sounds, videos and animations.

A r_sum_ is a document used by individuals to present their background and skillsets. R_sum_s can be used for a variety of reasons but most often to secure new employment. wikipedia.org

Media relations involves working with various media for the purpose of informing the public of an organization's mission, policies and practices in a positive, consistent and credible manner. wikipedia.org

A speechwriter is a person who is hired to prepare and write speeches that will be delivered by another person. Speechwriters are used by many senior-level elected officials and executives in the government and private sectors. wikipedia.org

Grant writing refers to the practice of completing an application processes for funding provided by an institution such as a government department, corporation, foundation or trust. Such application processes are often referred to as either grant "proposals" or "submissions". wikipedia.org

An electronic book (variously, e-book, ebook, digital book) is a book-length publication in digital form, consisting of text, images, or both, and produced on, published through, and readable on computers or other electronic devices.