What is Citi token services?

Excuse me, could you please elaborate on what exactly Citi token services entail? Are these services specifically designed for cryptocurrency transactions or do they encompass a broader range of financial applications? How do they work, and what benefits do they offer to users? Is there a particular technology or platform that Citi utilizes to facilitate these token services? Lastly, are these services available to all Citi customers, or are there specific eligibility requirements? Thank you in advance for your clarification.