Micro-interactions are where a site

Micro-interactions are where a site stops feeling like a document and starts feeling like a place.

United Carriers 2.0 is full of them. A custom cursor trail shaped after the logo. A footer that responds as you move through it. Considered hover states on every button and content block. Small state changes throughout that acknowledge the user's input.

Individually none of these are impressive, and that's the point. They aren't meant to be noticed. Together they create a constant sense that the site is responsive and alive, and that no element was left sitting on its default behaviour. It's the layer that separates a site that looks finished from one that actually feels finished.