stripping of the membranes??

So just left my ob appointment and the doctor said at my next appointment which is next week they will be checking my cervix and also stripping my membranes.. this is my 4th baby and they've NEVER done that nor even talked to me about doing it so I do not know what to expect now I'm kind of nervous! Anyone wana share some experiences or what should I expect! I'm 38+4 today measuring 39 at my next week I'll be 39+4