The Lenovo G505 has an 802.11n WiFi standard which is better than most portable PCs that were launched more than two years ago. Most portable PCs that came out around the same time as it have an 802.11b WiFi standard. This Lenovo portable PC also has an 802.11g WiFi standard.
An 802.11n WiFi standard is in fact the best Wi-Fi standard amongst all notebook PCs of a similar type and age to the G505.
Amongst comparable types of laptop the worst Wi-Fi standard is 802.11a.