The order ID you see in your dashboard isn't a random sequence. It's a structured identifier and reading it can save you twenty minutes when you're filing a support ticket.
First two characters: shard. We run multiple write-ahead shards for throughput; this letter pair tells us which one your order lives on. Support pulls the right database in one query.
Next eight characters: monotonic insert sequence. Higher means newer, always. You can read time from this without consulting the timestamp.
Last four characters: a deterministic checksum derived from the user ID + service ID + quantity. If this character set doesn't validate, the order ID is malformed and you're probably reading from a phishing email — flag it to support immediately.