Per Michael's comment, he has brought awareness to the people of Tibet to the outside world. This has affected the people of Tibet in that they survive as a culture today to a much greater extent than other culture groups that China is doing its best to eradicate through cultural assimilation.
For instance, there were international headlines when reports emerged that China was destroying Larung Gar in 2016. There were a few calls by the Tibetan government in exile (which used to be a theocracy with the Dalai Lama at its helm) for a UN resolution, and an official condemnation got voted by the EU Parliament.
Contrast this with e.g. the Uyghurs, which are a group of Turkic Muslims in the province of Xinjiang ("New Frontier") that are getting culturally assimilated at gun point. There's little to no international public awareness of their situation.