This victory is very important for Leverkusen because in another match Bayern Munich also won over Borussia Mönchengladbach. The two are still separated by two points, Leverkusen must always perform optimally if they want their position to remain safe, because Munich will never tire of reclaiming first place.
Darmstadt is actually not a tough opponent for Leverkusen, of course if they don't overcome this match and get good results it will put them below Munich, but Leverkusen has maintained its consistency to date, Xabi Alonso has a lot to learn from the mistakes of unsatisfactory results from their last match last week where they were held to a draw by Mönchengladbach which of course was detrimental to them making the point difference closer to Munich.
Next week is a decisive match where Leverkusen must face Munich, of course the result will determine who is the strongest and deserves to win the title this season, because if Leverkusen is defeated by Munich, it is certain that Munich will easily win the title this season and maintain its consistency until the end of the season. but if Leverkusen succeeds in beating Munich, of course Xabi Alonso's team will succeed at the end of the season in breaking Munich's dominance as defending champions in the Bundesliga. Leverkusen has that opportunity and they have to play as hard as possible.