Snap

Overview

Snap Inc. operates Snapchat, one of the world's largest social media platforms, as well as the Snap Audience Network for off-platform advertising. The Snap Pixel is Snap's advertiser-side tracking tag, placed on e-commerce and direct-response advertiser websites to measure campaign performance and enable advanced audience targeting for ads running on Snapchat. Snap competes with Meta Pixel, TikTok Pixel, and Pinterest Tag in the performance advertising ecosystem. Major advertisers using Snap Pixel include fashion retailers, gaming companies, consumer apps, and DTC brands targeting Snapchat's predominantly 13–34 demographic.

What This Script Does

The Snap Pixel script loads from sc-static.net (Snap's CDN domain) and initializes immediately on page load on advertiser websites.

Script file: scevent.min.js loaded from sc-static.net/scevent.min.js

Cookies set:

• _scid — first-party persistent cookie, 13-month expiry, stores Snap's unique visitor identifier for cross-session attribution and audience membership
• _scid_r — redundant persistent cookie (also 13-month) set as a fallback for environments where the primary cookie is restricted
• _scsid — session-scoped cookie for active session event deduplication
• Third-party cookies may also be set from snapchat.com in browsers that permit them, used for cross-site visitor matching against Snapchat's logged-in user graph

Events fired:

• Page view (automatic): Fires on every page load, transmitting page URL, referrer, and visitor identifier to Snap's servers at tr.snapchat.com
• Purchase: Fires on order confirmation pages with order value, currency, number of items, and product IDs
• Add to Cart, View Content, Sign Up, Lead: Standard ecommerce and lead gen events configured per advertiser
• Custom events: Advertiser-defined events for app installs, trial starts, subscription activations

Cross-platform matching:

• Snap attempts to match the _scid visitor to a Snapchat user account using hashed email addresses (if available via Advanced Matching) and device signals
• Matched visitors can be added to Custom Audiences for retargeting on Snapchat
• Unmatched visitors contribute to lookalike audience modeling

IAB TCF purposes: Purpose 1 (Store/access device), Purpose 3 (Create personalised ads profile), Purpose 4 (Select personalised ads), Purpose 7 (Measure ad performance), Purpose 8 (Measure content performance), Special Feature 1 (Use precise geolocation data).

Consent & Compliance

The Snap Pixel is unambiguously a marketing tool requiring explicit consent. It sets persistent long-lived cookies (_scid, 13-month expiry) for cross-session visitor identification, fires behavioral data to Snap's servers, and enables cross-platform identity matching with Snapchat's user graph for retargeting.

Under GDPR and ePrivacy, all of this processing requires prior opt-in consent. The UK ICO and French CNIL have both taken enforcement actions against advertising pixels that fire without consent; the CNIL fined multiple companies for deploying analytics and advertising pixels without valid consent mechanisms.

Under CCPA/CPRA, sharing visitor behavioral data with Snap for targeted advertising constitutes "sharing" of personal information for cross-context behavioral advertising, triggering opt-out rights. Snap participates in the EU-US Data Privacy Framework for EU-to-US data transfers.

Should You Block This Without Consent?

Yes. The Snap Pixel sets persistent 13-month tracking cookies, matches visitors to Snapchat user profiles, enables retargeting across platforms, and shares behavioral data with Snap's advertising infrastructure. Block until explicit marketing consent is granted.