NFL defense vs tight ends

Questions

Which NFL defense gives up the most receiving yards to tight ends?

So far this season, the Lions give up the most receiving yards to tight ends: 109 a game over 5 games.

What does defense vs position mean?

It shows how many yards, catches and touchdowns each defense gives up to one position, like tight ends. A defense that gives up a lot to tight ends can mean a big game for the tight end who faces it.