A survey found that repeated arguments made one set of participants unhappy. But this was not true for another group who believed that their partners understood them. What more, the more participants understood each other the faster they resolved the problems.
Feeling understood during conflict may buffer against reduced relationship satisfaction in part. This strengthens the relationship. It also shows that the partners are considerate and are open to a positive behavioral change.
Alex Fradera; “The Secret to a Conflict-Proof relationship? Feeling Like Your Partner Understands You”; BPS Research Digest. 2015 Nov 11.