From the article:
"But every car comes with a cord and a charging kit is an extra $700. However, Chevy made sure to go with the standard plug-in so that drivers can use public charging stations, he said."

This is perhaps at best confusing.

The car comes with a cord that allows you to charge from a standard 120v household supply. This may be useful in some circumstances, but it only yields about 4 miles of range for every hour of connection.

The car also has a standard (J1772) socket that allows you to connect to a 240v supply ("Level 2" charger), either from a home charging station or one of many public charging stations. This adds about 26 miles of range every hour, probably sufficient for most purposes.

The optional "charging kit" is actually a DC Fast Charger, that allows you to connect to--unsurprisingly--a DC Fast Charger...  These aren't as commonplace as Level 2 chargers, but will add 90 miles of range in 30 minutes. Handy if you have access to one.