The core activity of the company 'Textwerkstätte Alexander Humm' is the creation, correction and editing of German texts for various clients, including companies, organizations and private individuals. The specific services include: proofreading (spelling and grammar check), editing (content and stylistic editing), revising (revision of texts) and writing (creation of new texts). The company offers these services to support clients in creating error-free, convincing and readable texts that achieve their goals and appeal to their target audience.