It is a legitimate Samsung system application. It is not malware, spyware, or a virus. Because it is a system app, you will often see it running in the background so that your multitasking features are ready to use instantly. Can (or should) you disable it?
com.sec.android.app.flashbarservice is simply the "brain" behind your Samsung tablet's multitasking sidebar. It is a legitimate Samsung system application
Generally, you disable or force-stop this service. you disable or force-stop this service.