#CAC

Redis vs Memcached compared - data structures, persistence, and threading - with a clear verdict on when to choose each for caching and queues.

Understand Next.js caching - the data cache, full route cache, and router cache - how to revalidate or opt out, and when to add Redis for app-level caching.

What customer acquisition cost is, the CAC formula, the LTV:CAC ratio and payback period, and practical ways to lower CAC for your SaaS.