The core activity of Schaffer-Office encompasses two main areas: 1. **Trust Services**: The company provides administrative support to private clients and SMEs, including accounting, tax returns, payroll processing, correspondence with authorities, and mail processing. 2. **Real Estate Brokerage**: Schaffer-Office brokers real estate, including searching and selling properties, creating sales documentation, advising on price setting, and supporting the purchase process. Additionally, the company also offers other services, such as web design, assistance with moving to Switzerland, and apartment search.