What’s The Difference Between A Syndication Network And An RYS Stack?

In episode 149 of Semantic Mastery's weekly Hump Day Hangouts, one viewer asked about the difference between a syndication network and RYS stack.

The exact question was:

Can you tell me, what's the difference between a syndication network and an RYS stack? Syndication network via IFTTT looks like a great way to push new content out. Not sure what an RYS stack is or how it works in conjunction with syndication network. Can you explain?

Done For You RYS Entity Stacks: https://www.serpspace.com/marketplace/rys-entity-stacks

RYS Reloaded training: https://rysreloaded.semanticmastery.com