Counsel for a Newbie

I have had experience with Arduino in the past but am struggling to wrap my head around interfacing Blynk with an Arduino. Forgive me; computer science is not my absolute area of expertise but I am currently trying to challenge myself and branch out into a project. Is the example Arduino_Serial_USB all that is needed for a mobile phone to interface, or is it merely a base that can be worked upon? Is there an index or dictionary online of Blynk commands, or is that found in Blynk library?

Thanks for the help.

Yes “USB” is all you need for a Blynk cloud connection.

Effectively the index you seek is accessed by clicking DOCS at the top of this page.