Hey there @Lisa!
No problem! It seems that we’re getting more and more topics regarding that upgrade so there must be something hard to grasp in that info or not self-explainable. We’ll work on that!
Basically Auth0’s internal runtimes for extensions, rules, hooks, custom DB connections, and custom social connections are being upgraded to Node 8. This should not have any effect on your external applications that use Auth0, regardless of their runtime. Only code that runs inside your Auth0 tenants will need to be upgraded.