Quick Answer: Store field-level drop-off data by instrumenting every form interaction as structured events in your CRM pipeline: field focus, validation error, abandon point, time-on-field, device, source, and session ID. Then join those events to the lead record so you can attribute drop-off to specific steps, segments, and acquisition channels, and use the resulting dataset to optimize form length, field order, validation rules, and routing logic.
Field-level drop-off analysis requires event-level capture, not just a completed-form flag. The most effective pattern is to persist each form interaction in a CRM-connected event store or custom object table keyed to a lead, anonymous session, and submission attempt, with timestamps and metadata for every field state change. That lets you reconstruct the exact abandonment point, quantify friction by field and device, and correlate loss rates with traffic source, campaign, geography, or lead quality. In practice, the CRM should ingest normalized events such as field_viewed, field_blurred, validation_failed, autofill_used, and form_abandoned, then aggregate them into funnel reports and cohort analyses so sales and marketing can prioritize the highest-friction fields and highest-value segments.