Well that usually means it advertising the BLE , but I haven’t opened that example yet.
The Blue LED is the default color too, I believe?(LED_BUILTIN) generic.
If its flashing and connected when it’s solid on most of the examples I’ve seen.
Found it ,From the header,
also look at the Serial port monitor it should give you some output.
/* This sketch demonstrates the Bluefruit.Advertising API(). When powered up,
the Bluefruit module will start advertising a packet compatible with the