The METAR acronym roughly translates from the French as Aviation Routine Weather Report. A special report, SPECI, is merely a METAR formatted report which is issued on a non-routine basis as dictated by changing meteorological conditions.
Virtual Weather Station can download and present METAR data from over 7,000 official reporting stations around the world.
Since METAR is the reporting standard for weather observations, VWS generates METAR reports so you can share weather data. VWS also includes an interpreter, so you can interpret other METAR reports. The main reason users put their information on the internet is to share data. VWS provides a conduit for sharing weather information.