Shipping tier dimension
Shipping tier is the dimension that records the delivery option a shopper selected — Ground, Express, Same-day and so on — sent via the shipping_tier parameter on the add_shipping_info checkout event. It reveals how delivery-speed choice relates to conversion and order value. Because the value is a free-text label you supply, fragmented or shifting labels quietly distort the breakdown.
What this means
GA4's add_shipping_info event carries shipping_tier, the delivery option the shopper picked. The shipping tier dimension surfaces it so you can relate delivery-speed choice to downstream conversion and average order value.
It sits in the recommended ecommerce checkout sequence, between cart and payment.
Label hygiene
shipping_tier is free text, so inconsistent labels across templates or A/B variants split one real tier into several reported values. A sudden shift toward one tier can also reflect a changed default in the checkout UI rather than genuine demand.
Standardise the tier labels and watch for UI-default changes when interpreting movement.
- Sent on the add_shipping_info event
- Free-text delivery-option label
- UI default changes can mimic preference shifts
How it appears in analytics and logs
A shipping tier value names the delivery option chosen at checkout. A surge in one tier after a release can indicate a default selection changed in the UI, not shopper preference.
Diagnostic use case
Use shipping tier to analyse how delivery-speed selection relates to conversion and order value across your checkout.
What WebmasterID can help detect
WebmasterID can record the selected delivery option as first-party checkout context, so delivery-choice analysis works without third-party tracking.
Common mistakes
- Using inconsistent tier labels across the checkout.
- Reading a default-selection change as real demand.
- Confusing shipping_tier with the shipping cost value.
Privacy and accuracy notes
Shipping tier records a delivery option, not an address or a person. WebmasterID treats it as first-party checkout context, never as personal data.
Related pages
- Payment type dimension
Payment type is the dimension that records the payment method a shopper selected — Credit Card, PayPal, Apple Pay and similar — sent via the payment_type parameter on the add_payment_info checkout event. It is meant to be a generic method label, never card numbers or account details. It helps you see which payment options shoppers reach for and whether a method correlates with checkout drop-off.
- Transaction ID dimension
Transaction ID is the dimension that holds the unique identifier you assign to a completed purchase via the purchase event's transaction_id parameter. GA4 uses it to deduplicate purchases: two purchase events sharing one transaction_id within a window are treated as the same order, not two. Supplying a stable, genuinely unique value is what keeps revenue from being double-counted when a confirmation page reloads.
- The add_to_cart event
add_to_cart is a GA4 recommended e-commerce event that fires when a visitor adds a product to the cart. It carries the items added plus currency and value. It is a strong mid-funnel intent signal — stronger than a product view — and the denominator for cart-to-checkout and cart-to-purchase analysis.
- Event Explorer
Inspect checkout shipping selections first-party.
Sources and verification notes
- GA4 developer docs — Measure ecommerce (add_shipping_info)Documents add_shipping_info and the shipping_tier parameter.
Last reviewed 2026-06-24. Facts are checked against primary/official sources where available; uncertain specifics are marked “Data not yet verified” rather than guessed.