Dynamic product content is the part of an automated email that changes per recipient: the products, prices, images, and copy a shopper sees are pulled live rather than hard-coded. In Klaviyo and similar tools, these blocks break when the product data behind them is stale, incomplete, or blind to what the shopper actually did. Keeping dynamic content accurate is a product-data problem first and an email problem second.
Why dynamic blocks go wrong
A dynamic block is only as good as the catalogue feed and signals behind it. The common failure modes all trace back to data:
- Stale or broken feed. Price, stock state, and images drift out of sync with the storefront, so the email shows a sold-out product or an old price.
- Thin catalogue data. Products missing key attributes such as size, colour, material, or category produce empty or mismatched blocks, because the block has nothing reliable to filter and rank on.
- Behaviour-blind selection. With no per-shopper signal, the block falls back to a single bestsellers list, so every recipient sees the same products regardless of what they browsed.
- Rendering edge cases. Descriptions containing raw HTML, prices shown without the correct tax treatment, and untranslated copy in a multi-language store all surface in the rendered email.
Fixing these at the template level treats the symptom. The durable fix is upstream, in the product data and signals the block reads from.
Product data is the foundation
A block can only display what the catalogue gives it. Hello Retail Product Intelligence enriches the storefront product catalogue with attributes derived from product images and descriptions, which gives the email a cleaner, more complete set of fields to filter and present. Standardised attribute naming and populated meta-fields mean the block resolves to the right product with the right image and price instead of a gap.
Make the block behaviour-aware
Accuracy is not only the right data; it is the right product for the person reading. Hello Retail Product Recommendations rank products per shopper using behavioural signals captured on the storefront, and the recommendations are configurable per placement so the logic that drives an abandoned-cart block can differ from a post-purchase block. The result is that the same email surfaces different products to different recipients based on what each is most likely to buy.
Sending with Klaviyo
The send stays in the email tool the merchant already runs. Hello Retail integrates with Klaviyo so that audience segments and behavioural signals flow into Klaviyo flows and campaigns. Hello Retail Newsletter Content generates personalised newsletter content blocks for individual subscribers, intended to be embedded in the merchant’s existing email tool, and Hello Retail Audience segments shoppers and exposes those segments to downstream channels for targeting. Hello Retail supplies the accurate, behaviour-aware product layer, and Klaviyo sends. The two work together rather than competing.
A checklist for accurate dynamic content
Before the next campaign, confirm the layers underneath the block:
- Feed freshness: price, stock, and image fields update on the cadence your catalogue changes.
- Attribute completeness: the products you want to feature carry the attributes the block filters on.
- Behavioural signal: the block ranks per shopper, not from one static list.
- Rendering safety: descriptions are clean of stray markup, prices show the correct tax treatment, and copy resolves in every market language.
- Channel handoff: segments and signals reach Klaviyo cleanly so the flow fires on the right people.