Hightouch Match Booster — PII-Safe Ad Audience Enrichment (2026)

Official Hightouch documentation for Match Booster. Original queue URL (/docs/audiences/advertising-audiences) returned 404; docs restructured to /docs/match-booster/.

Key facts surfaced (2026-05-20):

• Enriches customer audiences and conversion events with supplementary identifiers to improve ad platform recognition rates.
• PII-safe architecture: data never persisted on Hightouch infrastructure besides a hash of the model primary key; first-party data stays in warehouse.
• Supported ad platforms: Amazon Ads DSP, Criteo, Meta, Google Ads/DV360, LinkedIn, Pinterest, Reddit, Snapchat, TikTok, The Trade Desk.
• Capabilities: audience boosting, conversion event boosting, anonymous visitor boosting (IP resolution), CTV device ID translation.
• Match key hashing: SHA256 or MD5 for emails/phone numbers (lowercased and trimmed); automatic normalization and hashing supported.
• No revenue-share or CPM activation fees.
• Curriculum reference: PII-safe advertising audience activation in configure-streaming-activation-destination (Module 6).