What I'm going to say has been mentioned by others.
I personally dont think it matters if you're doing a webserial, but it REALLY matters if you're writing a book on amazon. The reason there is a difference is because a good book has a beginning, middle, and an end. There's a natural structure that's expected if you're publishing a book, and you dont really want to go against structure in your debut, or first book in a series unless you're a genius. People are also buying your product, so you dont want to betray their expectations.
At that point however, you have to think about both your genre and your audience.
Are you writing a battle-heavy fantasy where there is strong emphasis on how powers interact and how battles unfold? Then, you're going to have a lot of battles, and then a break after the battles are over, because shit man, give them a break. Putting fluff chapters in between battles of the same arc isn't smart.
Are you writing slice of life with a dash of combat? You can probably have fewer battles between plentiful peaceful times. The audience isnt expecting a battle-heavy story and would be okay with it.
You could also follow narrative arcs and you'll see that their is a sequence of rising action and falling action. The idea of falling action is important, but there are a lot of ways of playing with narrative arcs.