"Counted or consumed by some characters' powers. This tile belongs to neither team." -- In-game tile description
Web tiles are used by certain characters abilities. They have no use by themselves, however they can increase the effectiveness of certain abilities. They are not owned by either team.

The following characters interact with Web tiles:

Venom (Eddie Brock), Carnage (Cletus Kasady), and Spider-Man (Back In Black) don't interact with Web tiles.