Excessive advertising can be used to poor people's disadvantage by creating more debt by encouraging more unnecessary expenses. AAs consist of a disproportionally large percentage of poor people and have chronically low wealth levels [1]. One could argue Google is bad for AAs by making advertising more mainstream and accurate.
In any case, at least they're trying, PR or not. Some companies do nothing. I do feel strongly about this because the amount of segregation in Boston is ridiculous.
[1] http://money.cnn.com/2016/06/27/news/economy/racial-wealth-g...