The effectiveness of marketing through social media

Discuss the effectiveness of marketing through social media on small to medium size enterprises (SMES) in Saudi arabia

First about globalization.
How is changing in marketing / the second about global beauty industry and marketing/ the last marketing communication/ I would like to provide me the links of references , because my supervisor asked me and please if I want any enquiry from the writer is that ok?I don’t want the supervisor doubted that what have written it not me , dont make it very high level in academic write