# Can product recommendations respect customer privacy? | RelevanceRail

Source: https://relevancerail.com/blog/recommendations-customer-privacy/

Product recommendations shoppers actually want


Updated September 19, 2026 · RelevanceRail answers

Yes. Recommendations can start with page context, catalog data, and session behavior, then use longer-lived preference data only when permitted. The model should still offer useful defaults when a shopper declines nonessential processing.

## The short answer

Yes. Recommendations can start with page context, catalog data, and session behavior, then use longer-lived preference data only when permitted. The model should still offer useful defaults when a shopper declines nonessential processing.

## Start with a clear purpose

Write down the storefront decision the data will change before collecting it. If a field does not alter content, recommendations, or service, leave it out. Clear purposes make retention and deletion rules easier to explain and audit.

## Respect the platform state

Shopify’s Customer Privacy API exposes whether preferences, analytics, marketing, and data-sale processing are allowed. Nonessential processing should follow those states, and consent should be recorded only after a visitor acts rather than being assumed automatically.

## Keep a useful fallback

A shopper who declines nonessential processing should still be able to browse, search, compare, and buy. Use catalog context and transparent defaults instead of turning privacy choice into a broken or blank experience.

## Validate the outcome

Test the experience with every consent state, document the inputs behind each decision, and review for stale labels or uneven outcomes. Personalization should be reversible when preferences or permission change.

## Source

This guide uses Shopify’s current Customer Privacy API documentation: [processing permissions and consent states](https://shopify.dev/docs/api/customer-privacy).

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## Frequently asked questions

### Can product recommendations respect customer privacy?

Yes. Recommendations can start with page context, catalog data, and session behaviour, then use longer-lived preference data only when permitted. The model should still offer useful defaults when a shopper declines nonessential processing.

### What data do recommendations need to work?

Page context, catalog data, and session behaviour are enough to start. Longer-lived preference data adds accuracy, but only when the shopper has permitted it. Write down the storefront decision the data will change before collecting it.

### What happens when a shopper declines nonessential processing?

The model should still offer useful defaults. Shopify's Customer Privacy API exposes whether preferences, analytics, marketing, and data-sale processing are allowed, and nonessential processing should follow those settings.

### How do you decide what recommendation data to collect?

Start with a clear purpose: write down the storefront decision the data will change before collecting it. If a field does not alter content, recommendations, or service, leave it out. Clear purposes make retention and deletion rules easier to explain and audit.