One of the big parts of the NFL draft process is a throwback for prospects to when they were in high school. They have all 32 teams that can ask for them to attend a visit as a form of recruiting but also getting to know the player better they may be drafting.
Each team gets 30 visits prior to the draft and with hundreds of players in the pool, each visit is valuable. When a team uses that visit on a player it is a great sign for them being drafted and for how the league sees them.
For players in the draft pool from Penn State, several have been receiving invites from a litany of teams across the league.