优化体验英文

I was at a tech conference in San Francisco a few years back, and I remember this one session where the head of a big app company talked about how they redesigned their user interface. They introduced a feature that allowed users to switch between dark mode and light mode based on the time of day. The crowd clapped, but I was more intrigued by the subtle changes. They mentioned that they had tested the new design with real users over a month, and the engagement on the app went up by 20% just because of this small tweak.
It got me thinking, how often do we overlook the tiny details that can make a huge difference in user experience? I mean, 20% increase isn't small when you're talking about millions of users. And then, etc., I suddenly remembered that my friend's startup had a similar problem. They had a great product, but the loading time was too long. They improved it by just 3 seconds, and their bounce rate dropped significantly.
So, is it the big changes that matter, or are the small ones the real game-changers?

Enhance user experience