Biggest Funnel Step Drop-off, Amplitude

Biggest Funnel Step Drop-off for Amplitude stores. Tracked live in Vortex IQ Nerve Centre. How to read it, why it matters, and how to act on it.

Metrics type: Key Metrics • Category: Analytics

At a glance

Biggest Funnel Step Drop-off is the single step in the merchant’s primary purchase funnel that loses the largest share of users in Amplitude, naming exactly where the most people abandon. It turns an abstract conversion decline into a concrete target by pointing at the weakest transition in the journey. The card pairs with sibling metrics in the Analytics category to build a complete diagnostic picture; cross-reference the related cards listed below for context.

What it counts	The funnel transition with the highest step-level drop-off percentage, derived from Amplitude’s Funnels analysis across the defined step sequence. The value is the abandonment percentage at that worst step.
Sample type	Backend API data from Amplitude, refreshed on the standard data refresh.
Why it matters	It tells you where to focus UX and merchandising work. The overall conversion rate says the funnel is leaking; this card says which step to fix first.
Reading the value	A higher percentage means a sharper single-step loss. Watch which step the value points to as much as the number itself, since the worst step can move between releases.
Currency	percent
Time window	30D
Alert trigger	any step >40% drop
Sentiment key	amp_funnel_step_dropoff
Roles	owner, marketing

Calculation

Calculated automatically from your Amplitude data. Amplitude’s Funnels analysis reports a conversion percentage between each consecutive pair of steps. The drop-off at a step is one minus that step-to-step conversion. This card takes the maximum drop-off across all transitions in the primary purchase funnel over the 30-day window and reports both that worst step and its abandonment percentage. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.

Worked example

A representative reading of Biggest Funnel Step Drop-off for a typical merchant on Amplitude. Suppose the funnel runs product view to add to cart to checkout started to purchase, with step conversions of 24 percent, 58 percent, and 71 percent. The product-view to add-to-cart transition loses 76 percent of users, the largest single drop, so the card surfaces that step at a 76 percent drop-off and trips the alert. That pinpoints the product page and add-to-cart experience as the priority, not the checkout. Use Vortex Mind to trace whether the drop concentrates on a device, browser, or campaign; for natural-language exploration, ask Ask Viq which products show the steepest abandonment at that step.

Sibling cards merchants should reference together

Card	Why merchants reach for it
amp_funnel_conversion	The end-to-end rate this card explains; read them together to size the leak.
amp_funnel_time_to_convert	Hesitation at the worst step often shows up as longer time to convert.
amp_top_conversion_paths	Shows which routes survive the drop-off step and which collapse at it.
amp_cart_abandonment_rate	Confirms whether the worst step is the cart-to-purchase transition.
amp_top_pages	Identifies the pages tied to the leaking step for targeted fixes.

Reconciling against Amplitude

Where to look in Amplitude’s own dashboard:

Open the Funnels chart and read the step-to-step conversion bars; the lowest bar is the biggest drop-off. Confirm the step definitions and conversion window match the Vortex IQ profile. Pathfinder can show the alternative routes users take after leaving the weak step, and Event Segmentation verifies the raw event counts on either side of it.

Why the Vortex IQ value may legitimately differ:

Reason	Direction	What to do
Period boundary. Vortex IQ uses a 30-day rolling window by default; an Amplitude funnel may be set to calendar periods.	Variable	Match the date range on the Amplitude funnel to a rolling 30 days.
Time zone. Amplitude buckets events by the project time zone; Vortex IQ aligns to the merchant reporting time zone.	Marginal	Confirm the project time zone matches your reporting time zone.
Filter or segment scope. Profile-level filters (platform, B2B, test users) may change which step ranks worst.	Variable	Apply the same segment to the Amplitude funnel.

Cross-connector reconciliation: complement with sibling cards in the same category for the full diagnostic picture. For divergence investigations, use Vortex Mind.

Known limitations / merchant FAQs

Q: How often does Biggest Funnel Step Drop-off update? The card refreshes on the standard data refresh (typically every 30-60 minutes for live integrations). For real-time signals, force a manual refresh from the dashboard.

Q: Why does my Amplitude dashboard show a different number? The most common reasons are step-definition differences, conversion-window length, period-boundary differences (Vortex IQ uses 30-day rolling vs an Amplitude funnel set to calendar months), time-zone alignment, and segment scope. Match these settings before assuming a real divergence.

Q: How does Biggest Funnel Step Drop-off relate to other Amplitude metrics? It localises the loss that the overall funnel conversion card summarises. Read it with the conversion percentage and time-to-convert cards to understand both where and why users leave. Single-metric reads can mislead; the diagnostic value is in the cross-reference.

Q: Can I customise the alert threshold? Yes, alert thresholds are configurable per profile in the Alert Rules tab. The default trips when any step drops more than 40 percent; adjust it to match your business baseline rather than relying on the generic default.

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Tracked live in Vortex IQ Nerve Centre

Biggest Funnel Step Drop-off is one of hundreds of KPI pulses Vortex IQ tracks across Amplitude and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English.

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