What was the whole METAR? There’s going to be visibility report, the present weather and and the sky condition. So in your example maybe something like 1/8 SM FG VV007. So you can only see 1/8 of a mile horizontally and then looking up you can only see 700 feet. Fog is the most likely weather condition, I guess really heavy rain, smoke or dust could also lead to that type of report.