<Table> Google Traffic <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Type of site </Th> <Td> Web mapping </Td> </Tr> <Tr> <Th> Available in </Th> <Td> Multilingual </Td> </Tr> <Tr> <Th> Owner </Th> <Td> Google </Td> </Tr> <Tr> <Th> Website </Th> <Td> maps.google.com </Td> </Tr> <Tr> <Th> Registration </Th> <Td> No </Td> </Tr> <Tr> <Th> Launched </Th> <Td> February 28, 2007; 11 years ago (2007 - 02 - 28) </Td> </Tr> <Tr> <Th> Current status </Th> <Td> Active </Td> </Tr> </Table> <Tr> <Th> Type of site </Th> <Td> Web mapping </Td> </Tr>

How does google know if there is traffic