NFL teams meeting with individual players is a significant part of the draft process. These meetings can happen at the NFL Combine, pro days, the Senior Bowl or a private workout.
For fans following the process, these meetings are sort of like poker tells for the draft, as they indicate what positions a team could be focusing on. Do teams draft players they haven't met with? Yes, they do. It happens all the time, but they have often spoken to other players at that position.
Who have the Baltimore Ravens met with so far? Check out the list at WalterFootball.com.