The Gunners are on the verge of clinching Champions League qualification for next season.
Mikel Arteta's side sit four points ahead of fifth-placed Tottenham ahead of Thursday's north London derby.
"That's all that matters, taking the three points. We have to win in different ways," said Odegaard. "Last time [against West Ham] was not our best game, but we won.
"Today I think we played really good in some parts and other parts we had to fight. But we got the three points and that's the most important thing, so we're happy.
"I think it was a good win, an important win. We know the situation we're in, so obviously we are very happy with the three points.
"Some parts of the game we have to do better and kill the game, but that's all that matters today. We always knew it was going to be a fight until the end, but three points are all that matters."
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