Dear Ildefonso Carvalho, thank you for your contributions to OpenStreetMap. Out of respect to other mappers, it is customary to fill the "comment" field with a human-readable description of the mapping in question, e.g. "mapped buildings in XY city" or so. Hashtags (which are aimed not at humans reading the description but at machines evaluating them) belong in the "hashtags" field, not in the comment. Thank you. 