This means that this girl was looking at different guys' profiles and sending them random messages.. For example: I was hitting up girls from Moldova on VK because I am going there to travel in May.. This means I went to VK to look at girls' profiles in the hopes that I would get lucky and make some friends and girlfriends...

It means she recently broke up with her old boyfriend and seems to be on the prowl for a new one by flirting, looking up their profiles and making herself available. If someone wrote that to you, run like hell ! She is not looking for a serious love affair.