Root rights allow you to use many unique apps. However, these rights may also apply to malicious apps, which is why you should generally avoid root.
More information
If you don't know what root means, your device probably doesn't have it. Root means that you can do anything on your device. For example, uninstall pre-installed apps. Root has to be activated on most devices. Theoretically, other people with access to your phone can also activate root in order to install spy apps, for example. Unfortunately, some apps that can potentially increase your security also often require root rights. Examples include backup applications such as "Neo Backup", but also apps such as "SnoopSnitch", which try to detect IMSI catchers or silent text messages. You should always carefully consider whether you really need root rights on your device. In the vast majority of cases, there is no good reason for this.
If you are not sure whether your device has root, you can try installing a banking app. This will probably not work and will display a message if root is enabled.