A brand is a type of product manufactured by a particular company under a particular name. Brands are very common on Twitter and other forms of online/social media marketing. One of the ironies of dril is that he is able to co-opt the same online space that corporations such as Procter and Gamble and Pepsi use to hawk their wares to consumers, and all the same time the magic of the internet allows a diaper obsessed, candle hoarding lunatic hold an equal amount of real estate on Twitter with these companies.
Dril will reference his own brand from time to time, usually as a justification for the content that he posts. In addition, some dril followers have collectively referred to the dril fan base as "The Brand."