● Technical
Zero Party Data
Data your customers voluntarily and explicitly share with you. The most reliable signal for personalizing the shopping experience.
Full definition
Zero party data refers to data that your customers choose to share with you voluntarily, proactively, and explicitly. This can include product preferences entered in a form, a size or shoe size indicated during sign-up, a declared purchase frequency, or a post-purchase review where the customer explains why they chose a product.
The concept was theorized by Forrester Research to distinguish intentional data from behavioral data. A customer who rates your product 5 stars and writes a detailed comment gives you zero party data: they tell you what they think, what they value, and what convinced them. It is a deliberate act, with qualitative richness that has no equivalent.
In a context where personalization is expected but privacy is protected, zero party data is the ideal path: the customer gives their consent, you benefit from quality data, and the trust relationship is strengthened. It is the opposite of hidden tracking. Brands that build their data strategy around zero party data benefit from reliable and durable information.
Concrete example
A cosmetics merchant asks its buyers, in the post-purchase sequence, to specify their skin type and beauty concerns. 60% respond. These responses allow for remarkably precise campaign segmentation: "dry skin" versus "oily skin" emails, ultra-targeted product recommendations.
Customer reviews themselves are structured zero party data: the customer describes their profile ("colored hair", "daily use"), usage context, and satisfaction. These elements directly enrich product listings and feed personalized AI recommendations for future visitors.
With Review Collect
Review Collect transforms every post-purchase review into structured zero party data. The rating, comment, and custom fields you configure (usage context, buyer profile, recommendation) are all data voluntarily shared by your customer. You build a unique customer knowledge base.
With a 39% response rate on your collection campaigns, you accumulate each month a significant volume of actionable zero party data: product improvement, CRM personalization, catalog enrichment, and strengthening your credibility with search engines and LLMs.
