It means "who".
Vem är det? / Vem där? Depending on situation.
"Vem är svensk?"
who is it
A qualified guess is that it is a wronlgy written message, whose correct form would be "Vem är detta", meaning "Who is this"
VEM Aktienbank was created in 1997.
Vem! in Portuguese is "(You) Come!" in English.
Vem Pra Mim was created in 1993.
The duration of Vem vet mest? is 1620.0 seconds.
Vem Dançar Kuduro was created in 2010-01.
"Am" as in "I am" is "är" in Swedish.
It means Mr in Swedish.
Har means has in Swedish.