The core activity of the company 'Estermann Marketingberatung' consists of strategic consulting and accompaniment of small and medium-sized enterprises (SMEs) as well as individual entrepreneurs in the field of marketing. The specific activities include: conducting analysis workshops to identify strengths, weaknesses and untapped potential in marketing; developing tailored marketing strategies through strategy workshops; long-term accompaniment and support in the implementation and optimization of the marketing strategy; and training and lecturing to convey practical marketing knowledge. The core activity of the company can thus be described as 'marketing consulting and accompaniment'.