The Acer Chromebook C730 has an 802.11n WiFi standard which is better than most notebook PCs of this age and type. Most similar spec laptops that have been around for around the same time as it have an 802.11g WiFi standard. In addition, this notebook PC have 802.11a and 802.11ac and 802.11b WiFi standards.
This notebook PC's Wi-Fi standard (802.11n) is actually the best Wi-Fi standard amongst all Chromebooks that came out around the same time as the Chromebook C730.
An 802.11a WiFi standard is the worst Wi-Fi standard amongst similar types of notebook PC.