What are trac ordinals?

Excuse me, I'm a bit perplexed about a concept I've encountered recently in the cryptocurrency world. Could you please elaborate on what trac ordinals are? I've heard they're somehow related to the ordering and identification of transactions within a blockchain, but the details remain murky. As a practitioner in the field, I'm eager to gain a deeper understanding of this emerging technology and how it can potentially shape the future of digital currencies. Could you explain, in a concise manner, the key features and implications of trac ordinals? Thank you for your time and assistance.