Online intermediation services are key enablers of entrepreneurship and new business models, trade and innovation, which can also improve consumer welfare and which are increasingly used by both the private and public sectors. They offer access to new markets and commercial opportunities allowing undertakings to exploit the benefits of the internal market. They allow consumers in the Union to exploit those benefits, in particular by increasing their choice of goods and services, as well as by contributing to offering competitive pricing online, but they also raise challenges that need to be addressed in order to ensure legal certainty.