Posted 25 May 2017 - 04:23 PM
It kind of depends on what you consider secure enough.
iPads and other iOS devices are pretty hard to screw up. iPads (and other iOS devices) are designed pretty well for less technical types (which is why some people don't like them as they much more restrictive in what you can do compared to a Windows or Mac computer or even an Android tablet to some degree). Typically, the worst that can happen is you delete an app or some content. Apps can much more easily be reinstalled than your typical Windows or Mac app (just a matter of re-downloading from the App Store). Data/content is the bigger problem, but just like any computer that aspect can be mitigated by having a backup.
If you are worried about ads, then there are now ad blockers you can use with the built-in Safari browser...I believe. I personally don't use any, so I don't have any recommendations.
There is no antivirus really to install as the iOS system is locked down enough that non-Apple apps (such as an antivirus type program) cannot really access any "deep" layers needed to do anything. This also means that the normal avenue that malware/viruses would take are more or less cut off. Anything that effects an iOS device will be more about exploiting a bug or weakness in iOS, not your traditional infection of a file.
If you are talking about a kid and want to use some sort of parental controls, then there are some built-in that you can use, but they have their limits (like more parental control options).
Beyond that, there is not much to do.