The core activity of the company 'Restaurant und Hofgut Grosstannen' consists of three main areas: 1. **Agriculture**: The farm is a working farm that raises cows and grazes them on the alp to produce milk, from which fine alpine cheese is made. 2. **Catering**: The company operates a restaurant that is only open by prior appointment for groups of 35 people or more and offers meals, including brunch, farmer's buffet and its own wines. 3. **Sale of agricultural products**: The farm shop sells products from its own production, such as alpine butter, alpine cheese, its own wines, spirits, honey, sausages and other products.