Twilio Verify API is a turnkey solution for user verification across multiple channels like SMS, email, WhatsApp, TOTP, Passkeys, or Silent Network Authentication (SNA). The milestones to onboard your project to Twilio include setting up an account, selecting the appropriate verification method and channel(s), configuring Verify with fraud prevention and cost effectiveness in mind, successfully verifying users across channels, and implementing production support processes. Key success criteria for implementation may include reduction of Account Takeover (ATO) or SMS pumping fraud, support cost reduction, overall cost reduction, conversion rate improvement, time to convert improvement, or other types of fraud reduction.