Adding to @ian-partridge’s point, from my experience optimizing workloads for startups, understanding how long does the AWS Lambda Free Tier last, and what are its limits? also means knowing what comes next when you exceed them. Right after crossing the line, AWS charges $0.20 per 1 million requests and about $0.00001667 per GB-second. It’s not much at low scale, but if you’re running multiple functions or large payloads, monitoring your usage becomes essential.