How do I configure Fastly properly?

The default Fastly config that ships with ACC is generic — it’s a starting point, not the destination. Real tuning involves:

• Custom VCL for query-param normalisation, geo-routing, A/B-test splitting
• Image optimisation edge rules (WebP/AVIF on the fly)
• ESI fragments for personalised blocks (cart, customer name)
• Proper Surrogate-Key tagging so cache-purge is targeted not nuclear
• Bot-protection rules + rate limits

Done right, you go from 60% to 90%+ cache-hit rate, which cuts origin compute by 10× and bandwidth costs alongside.