On their own, mobile Web sites might not be drawing a whole lot of traffic, but, according to a new Nielsen report, they're proving successful at extending brand reach.

Numbers from Nielsen's TotalWeb measurement service show that mobile Web sites on average extend the reach of a leading Web site by 13%, says a MediaWeek article on the report.

TotalWeb tracks the number of visitors to a digital property across the various platforms, such as the Internet and mobile. The research found that weather and entertainment sites benefit the most from their mobile counterparts, garnering an average 22% extended reach.