Does anyone know why...

Bran warged into the crow/s during the final battle against the White Walkers? It seemed like all he did was fly up into the clouds and go past the Night King riding his dragon, then nothing until he came back to his body as the Night King was approaching him to kill him. It didn’t seem like he had any motivation for doing that, other than maybe feeding his personal curiosity for where the Night King was because it didn’t seem like he used that information for anything or told it to anyone. Not that that information would even be useful in the first place as the Night King was continuously moving around. “Hey guys! I used my super powers and found out that the Night King is flying around somewhere beyond the clouds, so don’t worry we can easily defeat him with that incredibly useful information. I can even point toward the rough direction of where he was before he moved to wherever he is now!” I kept expecting something more to happen with him warging into the crows. As well as him using his warging powers more throughout the plot to aid in battles and whatnot. Like he could have taken control of enemy cavalry horses and make them throw their riders off, or use bears to attack them or something cool. I was sure that he was going to warg into a dragon at some point in the series and take out tons of the undead.