Is Twitter's Revenue Dependent on Brand Advertising?

I really need to see how these things have been calculated. It can't be some deep mystery that is more complex than the human soul, or something like that. The accuracy of these filings is important whether you're buying one share or the whole company. And so if these filings are inaccurate, if they're sort of potentially bla, it's a big deal. Do they not have the technical capabilities to solve the problem? Or is tit more like just to they've under prioritized the issue and were unwilling to because, potentialy, theyare infocations foraaad revenue? I don't know. It's speculative at this point.