I don't think you mentioned at what range this link can be maintained between two individuals, but if it operates at fairly significant distances, say up to a couple km or miles, here are some extra advantages.
Both individuals can split up and search for food more effectively, such as within a forest. If one of them finds something tasty and worth eating, the other can be guided to that location. If there are threats in the area that the finder has taken note of, such as harmful plants, predatory animals, or physical hazards such as strong rivers, sinkholes, ravines etc., the approaching individual can be made aware of and/or guided around them.
You could call this a task in a way, as well as a duty, if both individuals are important to one another for whatever reason. In the context of a relationship, for example, whoever is in a potentially dangerous area could constantly transmit information about the status of his/her exploratory mission. If he/she is attacked, that could be immediately made known to the other, and he/she guided to the exact location of the individual who was attacked. Additional information about the nature of the attackers, such as weapons, numbers, tactics, etc. could also be sent. This would give the responding individual advance notice and time for them to plan a counterattack/rescue strategy beforehand. This would of course work much better if the distance between the two was relatively small, so as to allow for more rapid intervention.