Researchgate recommends questions to us by indicating "questions we think you can answer". I am curious how these questions are assigned to us, e.g. is it based on our "skills and expertise" we indicate in our profile, the research interests we indicate, the keywords of prior questions we answered, or a combination of all these aspects, or something completely different? I assume there must be some automatic algorithm that recommends questions to us. Sometimes questions match very well with my expertise, in other circumstances they don't.