Hi,
the email lists the 4 benchmark songs that come around every 4 month (or so). This month has Old Man as its benchmark song. Probably next month will have Ain’t no sunshine as its benchmark.
Benchmark songs and weeks are thought to measure your progress. Record yourself, make notes, compare with last time the song was around and celebrate your progress!
If you can’t wait until the two songs come around again, you find last month’s challenges linked in your momentum email, and there you have Hotel California:
https://tonypolecastro.com/courses/november-guitar-routine-2-2/
For Wagon Wheel you have to go back to october (or wait till february ;O) ):
https://tonypolecastro.com/courses/october-guitar-routine-2-2/