Next.js App Router patterns we ship in production

The App Router rewards clear boundaries: layouts for shared chrome, streaming for perceived performance, and caching discipline so marketing sites stay fast under campaign spikes—without turning every deploy into guesswork.

Layouts and composition

• Use route groups to organize marketing vs. app surfaces without URL hacks.
• Keep server components default; reach for client components only where interaction demands it.

Performance patterns that matter

1. Loading UI — Meaningful skeletons beat blank screens during slow data.
2. Streaming — Progressive rendering for long pages and dashboards.
3. Cache tags — Invalidate precisely when content changes—not “revalidate everything.”

Common pitfalls

Over-clientifying the tree, fetching in parallel without prioritization, and “dynamic everywhere” that destroys caching wins.

Pattern	Good for
Partial prerendering (where available)	Mixed static + personalized sections
Edge middleware	Geo routing, auth gating, experiments

DigiiMark ships enterprise marketing sites where Layouts, loading.tsx, and cache discipline are first-class—not an afterthought.