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.
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If you don't know what root is, you probably don't have it. Root has to be activated on most devices. Unfortunately, some apps that can potentially increase your security 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 superuser rights on your device. In the vast majority of cases, there is no good reason for this. Apps such as "SnoopSnitch" only work in very few software and hardware constellations anyway. Setting up root for this reason is out of all proportion.