---
title: "Edge Caching / CDN — Definition & Engineering Context"
description: "Edge Caching is the practice of storing static files, API JSON payloads, and pre-rendered HTML pages on servers located close to the user (at the 'edge' of the network) to reduce latency and speed up page load times."
canonical: https://erpstack.io/glossary/edge-caching
markdown_url: https://erpstack.io/glossary/edge-caching.md
publisher: ERPStack
---

# Edge Caching / CDN

> **Definition:** Edge Caching is the practice of storing static files, API JSON payloads, and pre-rendered HTML pages on servers located close to the user (at the 'edge' of the network) to reduce latency and speed up page load times.

## In depth

Instead of routing every page request back to a central server, CDNs cache pre-rendered pages at regional edge nodes. This reduces server load and decreases time-to-first-byte (TTFB) to under 30ms globally. We use on-demand revalidation to clear this cache instantly when database records are updated.

## How ERPStack applies this

We configure global edge caching on Vercel's Edge Network for all ERPStack marketing hubs and static assets, achieving sub-second load times.

## Related reading

- [Headless ERP](https://erpstack.io/glossary/headless-erp)
- [Incremental Static Regeneration (ISR)](https://erpstack.io/glossary/isr)