Find Best Digital Marketing Dissertation Topics | Forum

I am here to find motivation since I am on the final stage of my dissertation on digital marketing. Have there been any suggestions or proposals as to digital marketing dissertation topics that may outstand others? I would also like to know new or innovative trends in digital marketing to possibly get some helpful information. I would also like to know about some challenges that this sector is going through right now or some opportunities that are yet to be realized. Thanks in advance for the help.