We were just told my 96 year old mother has one (suspect to be benign). She had a bad fall and they did a CT scan looking for stroke or brain bleed (found neither) but did find a Meningioma. I wasn't expecting this news at her doctor appointment and didn't even know what it is so didn't have any questions to ask at the time. Her doctor said to find out more would requires a MRI and a visit to a neurologist. Recently my Mom has been complaining of headaches.
I think that with all the imaging we do today we often find things that would have never been discovered in the past. It is probably worthwhile to see the neurologist and find out her options. Her headaches may not be related to the meningioma, or they may be able to manage her symptoms with pain medication. At 96 I expect it is unlikely that they would recommend any treatment beyond that.