Makes a huge difference when you're just figuring out where to spend your time. When I started reading translated stuff years ago, I'd see 'web novel' and think it was just a book posted online, so I expected polished chapters on a schedule. Boy, was I wrong. Got into one that was basically the author's first draft, posted at 3 AM whenever they felt like it, with notes to readers in the middle of chapters asking what should happen next. That's the core of it—the definition tells you about the creation process. It's serialized, often interactive, and rarely edited like a traditional novel. Knowing that sets your expectations for pacing, consistency, and even grammar. You're not signing up for a finished product; you're joining a chaotic, live workshop. That can be a feature, not a bug, if you're ready for it. I learned to love the rough edges and community vibe, but I wish someone had spelled it out for me earlier.
It also clues you in on structure. Many web novels are massive, with hundreds of chapters, because they're written to keep readers hooked daily. If you're worried about commitment, that definition is your warning label—or your invitation, if you want a story that never seems to end.