The reason is the step to get right. Google's help page gives two example reasons, Spam and Profanity. Hate speech isn't one of them, and the page lists no others. If the menu you see has nothing that fits, pick the closest match to the argument you're going to make and save the detail for the appeal. That's Stefan Somborac, in the Local Search Forum. Pick with care, because TrueReview says Google judges the appeal against the reason you picked at the report step. By its account, an appeal that argues a different section starts uphill.
The tool then comes back with one of three statuses. Decision pending, meaning nobody has looked yet. Report reviewed with no policy violation found. Or escalated, with the final decision coming by email.
And there's a catch. If the answer is no violation, Google gives you Google's one-time review appeal. One appeal per review, ever. You name a policy when you file, and naming one that doesn't match your argument can waste the one appeal you have. So the filing is the whole job. You file it from your own profile. We never submit anything to Google.
A hate speech appeal argues one clause. For a review like the sample below, that's the clause about content that belittles or vilifies people over a protected characteristic. The appeal names the words that do it and the characteristic they're aimed at. If the review urges violence against a protected group, it argues that clause instead. If the review calls you racist, read the question above before you file, because by our read that argument belongs to a different section.