Previously few months back the ad-block particularly on android was good but not at par of u-block origin on android (Gecko android extension). But from last month it has gotten really good on par with u-block origin or even better than that since gecko on android with extensions is impossible to use. There were some sites (novel sites) which I frequently visited which used to spam ads and bogus redirections to the user since they put up pirated content on these sites. But, the ad-block is tweaked considerably and not a single ad or redirection went through brave shields. I think @fanboynz oversees the ad-block in brave team, good job done, whoever did it in respect to android ad-block. Also, it has become on par with UBO on PC too. Specifically for me better than UBO since I don’t like using too many extensions for stuff that can be done by browser.
Now, I don’t know that they took the PC list put it in android or manually created a list specifically for android. If it is latter then pretty good work done. I could tip BAT to @fanboynz on this forum but it seems it is not supported.