In short, "wide angle" refers to a type of camera lens or lens setting that captures a wider field of view than a normal lens. It enables you to see more of the scene in a single shot. Full definition
On the front, there is a 5 - megapixel front facing camera with 78 - degrees wide angle lens with LED flash for capturing selfie images and talking video chats. (phoneradar.com)
On the front, the device is integrated with a 5MP shooter with 85 - degree wide angle lens for selfie photos, 1080p videos and chats. (nashvillechatterclass.com)
It also has an 100 - degree wide angle camera on the front for selfies. (indianexpress.com)