The code, as it is, uses several feeds in a single feed group that you'll need to set up first.
If you don't have an Adafruit IO account or are unfamiliar with setting up feed/groups, see the Welcome to Adafruit IO guide.
You will need to set up a group named Environmental_Sensor containing the following feeds:
Add your Adafruit IO account credentials to the secrets.py file and it should be ready to go.
You can look at the collected data directly in the feeds, but making a dashboard gives a better (sometimes) view of it.