WiFi on its own is generally OK for some networks but others require a bit more control. For example, you may want to provide guest WiFi or cover a larger area with with your WiFi. This is where managed WiFi works for you.
When introducing a guest network for your customers or visitors it is important that it is easy for them to connect to but at the same you need to protect your own equipment. With managed WiFi this is possible.
Adding additional access points to cover a larger area, for example a multiple floors or rooms this is also a candidate for managed WiFi. It also handles devices moving from one area to another without issues.
