Overview

Offsite Ads overview, supported channels, and key benefits.

Topsort Offsite Ads

Topsort Offsite Ads enables marketplaces to launch vendor-funded advertising campaigns across external channels like Google, Meta, TikTok, and Snapchat.

With one unified campaign flow, marketplaces can let vendors promote their products offsite using catalog SKUs, uploaded creative assets, or both. Vendors create campaigns in Topsort, ads run on external platforms, and shoppers are driven back to the marketplace to generate incremental GMV.

Marketplaces can use the Topsort UI or build their own experience on top of the Topsort Offsite API. All core UI functionality is available via API.

Why run offsite ads with Topsort?

Instead of managing separate advertising programs directly across Google, Meta, TikTok, and other platforms, Topsort gives marketplaces a unified way to operate, attribute, and scale offsite retail media.

Self-service campaign creation

Vendors can create offsite campaigns through a familiar Topsort experience, using the same wallet, billing, and campaign-management patterns they already use for onsite ads.

Topsort supports both prepay and postpay billing models. For campaigns using uploaded creative assets, marketplaces can also enable an ad-ops approval flow before campaigns go live.

This helps marketplaces scale offsite advertising without scaling manual operations at the same pace.

Marketplace-owned attribution

Each external ad platform uses its own attribution methodology, making performance difficult to compare across channels.

Topsort collects offsite click and purchase events directly, allowing marketplaces to apply a consistent attribution window across all offsite campaigns. You can define an attribution window between 7 and 30 days, and Topsort will apply it consistently across supported sources.

Less integration complexity

Running offsite campaigns directly often requires separate integrations, setup processes, and catalog-management workflows for each ad platform.

Topsort simplifies this by guiding marketplaces through the setup process for each supported channel, including catalog syncing where required.

Unified multi-channel execution

Marketplaces and vendors can create campaigns across multiple offsite channels and formats from a single Topsort flow, instead of rebuilding the same campaign across separate ad platforms.

Supported Channels and Formats

Google Ads

• Performance Max (catalog-based)
• Shopping (catalog-based)
• Performance Max (asset-based)
• Search (asset-based)

Meta Ads

• Catalog-based ads
• Single image asset ads
• Carousel ads

Snapchat Ads

• Dynamic Product Ads (DPA), catalog-based

TikTok Ads

• Smart+ Catalog-based ads

See Also

• Onboarding
• Campaign Creation and Reporting
• Attribution and Billing
• Offsite Ads API Reference

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